restore Build,TODO from r57911

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+$Id$
+Public domain.  TeX Live TODO:
+
+0. Remaining todo.
+1. Package updates
+   a. fix ctan2tds and friends
+   b. outstanding package updates
+2. Source updates
+3. Infrastructure and installer
+   a. tlmgr
+   b. more
+4. Random stuff
+5. Won't do
+
+0.* Forever.
+==========================================
+*** work on the items in the TODO file!
+Consider items in the tracker: https://puszcza.gnu.org.ua/bugs/?group=texlive
+
+0.1 After release.
+===========================================
+* retry untar if it failed after 3sec (configurable timeout) to make sure
+  other programs have passed by
+
+* Rewrite installer option_ handling that *always* the option name in
+the tlpdb and in the $vars{'option_*'} agree.
+Make initialization of those options from the tlpdb using
+	$tlpdb->option('-installer' => 1)
+not complain on the tlpsrc-set (installer only option) not complain
+
+
+1a. fix ctan2tds et al.
+-----------------------
+(Aside from the whole script being a horrible kludge that needs
+rewriting from scratch.)
+
+tlprm and place do not know how to delete all emptied parent directories.
+
+csplain cstex cs cslatex (and others) -- tlpkginfo should create the
+directories, so that tlpkg-ctan-check can check them, instead of doing
+some of the weird unpacking in ctan2tds.pl.
+
+if ask for susy and have Susy, or reverse, complain.
+
+place should run t1lint on pfb's, etc. (a la check-files-by-format).
+
+place should complain about inconsistent line endings and
+	case-insensitive clashes instead of leaving it for the nightly run.
+
+1b. outstanding package updates
+-------------------------------
+check all mentioned in staw msg on tldev, 23 Apr 2008 23:56:50.
+
+genmisc et al. need work (see "sorry" in ctan2tds)
+ethiop madness: combines ps-type1/ethiop and other packages.
+eulervm vs. euler vs. new euler ... no eulervm.pdf
+logic/gn-logic14 conflicts with logic font
+
+
+2. Sources updates
+==================
+kpse: texmfdbs should not have to exclude non-!! dirs, should be able to
+  go back to just TEXMF. kpathsea should search the disk even if ls-R is
+  present, without !!. (koch 29dec06) but it feels too late to change this.
+
+
+3. Infrastructure and installer
+===============================
+3a. tlmgr
+* improve info <pkg> output for multiple repositories
+
+* xetex conf.d postcode:
+1. I'm sorry, but can you remind me why we have xetex/conf/conf.d/*.conf
+   and why we copy them in our installation?  Neither XeTeX or LuaTeX
+   do anything with these files, right?  Some of them refer to fonts
+   and/or software that are not in TL.
+
+2. According to my current understanding, we should actually be creating
+   texlive-fontconfig.conf when luatex is installed, not just xetex.
+   Although luatex does not use -lfontconfig like xetex does, it still
+   reads the fontconfig configuration (specifically,
+   /etc/fonts/fonts.conf) and thus to use system font name lookups in
+   luatex on Unix, fontconfig stuff must be done.  Am I missing
+   something?
+
+* pinning
+should we add a way to allow for numerical comparison of revision?
+
+
+3b. More
+- keep list of forcibly removed packages in tlpdb, so package-to-package
+  dependencies can really be followed.
+
+- _install_package in TLMedia and install_package in TLUtils appear to be
+  doing basically the same job. Bad. Rewrite installer to use
+  TLMedia instead of the TLUtils hacks.
+
+- tlpobj vs actual files vs other packages installation, aka safer^2
+  currently we just unpack what is in the tar file, but never check that
+  the contents actually agrees with what is listed in the tlpdb. We not
+  even check that the tlpobj contained in the container agrees with the
+  tlpobj taken from the tlpdb. That allows to ship practically everything
+  in the container, overwritting unrelated files.
+  Also not checked is that unpacking the container does not overwrite
+  files from a different package.
+
+- extend revisions (Master/tlpkg/etc/generalize-revisions.diff)
+  (implemented and working)
+  we want: NNN[.RRR]
+  - NNN as normal revision number
+  - .RRR to provide various upgrades (think of context providing
+    packages with everyday addint +1 to the revision number they could
+    easily overtake upstream texlive)
+
+- change tl-update-tlnet and tlpkg-by-size to implicitly get the network
+  release directory (tldev, 2008) instead of hardwiring.  Then update
+  doc/packages.txt.
+
+infra: texmf/xindy not reported by check-file-coverage though not in tlp's
+
+MAYBE TODO (needs discussion)
+- ordering or collections removal (see below for details)
+- (?) removal does not remove created format files from TEXMFSYSVAR
+- after install/update show the number of bytes transfered 
+  (email Rolf Niepraschk)
+
+
+4. Random stuff
+===============
+stop using system(foo <bar >baz) (in tlmgr, installer, everywhere)
+to avoid shell quoting problems; see dev/dev.sys_redir.pl.
+Use list form of system if at all possible.
+
+resolve the psnfss/fonts/metrics chaos
+	see http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=433137
+	(aren't there other more general debian bugs? utopia and fpl
+	aren't the problem.)
+With the metric files, the problem isn't so much the packaging as the
+provenance.  We do not know where many of them came from, some
+correspond to nonfree fonts, others are obsolete, etc., etc.  And yet,
+removing any tfm at all will probably break documents and/or packages.
+frank@kuesterei.ch's msgs to tex-live of 23 Oct 2006 19:19:28,
+11 Oct 2006 13:32:20, and related begin to get at the problem.
+... meanwhile, we could at least merge all the "font" packages
+(avantar..zapfding) into psnfss, where really they come from on CTAN?
+rk mail to tldev, 19 Sep 2009 01:06:34.
+
+repo: make special repo backups
+repo: memman.pdf, etoolbox.pdf, hyperref README.pdf -- svn guesses
+      wrongly that it is text, resulting pdf is junk, pdffonts can't
+      read it for example.  original on ctan is fine.
+      1) check for other broken pdf's (done by check-files-by-format)
+      2) change place to 
+        svn propset svn:mime-type application/octet-stream
+         for all *.pdf.
+        (done in r11793 but comment says 'needs testing')
+      3) report heuristic bug to svn.
+
+doc: utf-8 fails accent chars with texlive-ge
+
+tex: --no-mktex=fmt  should be supported
+pdfopen: fixed http://magic.aladdin.cs.cmu.edu/wp-uploads/mavpdfopensrc.zip
+
+iso: optimize image, http://www.tina-vision.net/tina-knoppix/remastering.html
+
+sigh: lm vs. ec, 3jun06/stubner.gz msg
+
+announce: slashdot.org, freshmeat.net, prweb.com, prnewswire.com ?
+
+Things to do that karl noticed in TL'05, many still relevant :( --
+      dvips psfonts.map != pfb /Fontname => courier
+      qa: online mf
+      qa: pdfetex -ini \&etex story sparc crash (sparc)
+      qa: wrong /Length embedding, http://www.tug.org/pipermail/tex-live/2004-September/006755.html
+      qa: wncyr10
+      qa: english hyphenation in context!
+      cdbuild/dupl.pl, 8-bit pseudoprint from olaf
+      eitan real source for .tex (seb 10oct04)
+      check that all pfb's are in psfonts.map
+      kpsewhich mention which env names in debug output/if not found
+      autoupdate .bib files
+      fr hyphen test (from eurotex03 abstracts + de from hufflen?)
+      output format initialized in log file, 16 Nov 2004 08:09:16 +0100 gaulle
+      ps2ps/bbox for pdftricks, 15 Nov 2004 15:07:26 +0100 gerben
+      doc: bio of contributors, with pictures
+      doc: tex-live.sty no include lmodern, for German
+      special.map: handle like main maps (wl mail, 19 Jun 2005 01:21:15 +0200)
+
+5. WON'T DO:
+============
+should only find package names at the appropriate levels, so that
+graphics.tlpsrc does not have to include lines like
+docpattern +!d texmf-dist/doc/latex/tufte-latex/graphics
+-- No, the special cases involved are worse than the disease.
+
+tex: implement fancier behavior at prompt file name, see knuth update notes
+and thread at http://tug.org/mailman/private/tex-implementors/2008/001925.html
+-- No, current behavior seems good enough, interactive use is minor.
+
+use unzip 6.0?
+-- Not until we see that there's some gain.
+
+Create a "single user" installation option such that
+TEXMFSYSCONFIG == TEXMFCONFIG and TEXMFSYSVAR == TEXMFVAR
+so that updmap and updmap-sys would do exactly the same thing,
+hence never conflict.
+-- this would just add another layer of confusion and source of error.
+
+Have BibTeX not require .bib extension, similarly not other extensions.
+(suggestion from Bob Morris to karl, 10 Oct 2015).
+-- no, because if "bibtex foo" found "foo" when there was no foo.bib,
+it could easily be a binary. This has been a constant problem,
+introduced from day one by the concept of "default extension". I fear it
+is too deeply embedded in all TeX software by now to change.