[PATCH 0/6] gitweb: Improve ctags, introduce categories

This series is composed of two independent parts: improvements to content tags (ctags) handling in patches 2-3, and introducing optional grouping of projects by categories in patches 4-6 (where 4-5 are preparatory).

Both of those series are based on 1st patch in series which restructures how projects list is being generated, to make those changes easy to introduce. Because both of those depend on the same introductory patch they are put in single series... that and the fact that there was trivial conflict to be resolved in rebasing 'project category' part on top of 'ctags' part.

Table of contents:
~~~~~~~~~~~~~~~~~~
* [PATCH 1/6 (v2)] gitweb: Restructure projects list generation

  This patch extracts filtering out "forks" and searching for projects
  (i.e. limiting listed projects) into separate subroutines.  Also
  filtering is done upfront and not while printing.  This makes for
  more clear code and makes subsequent changes much easier.

  Filtering forks is now faster thanks to using trie; see comments in
  code and in the patch itself.

* [PATCH 2/6] gitweb: Change the way "content tags" ('ctags') are handled

  Making ctags info parsing more robust sort of fixes bug noticed in

    gitweb: cloud tags feature produces malformed XML for errors
    http://thread.gmane.org/gmane.linux.debian.devel.bugs.general/802865/focus=168266
    http://bugs.debian.org/616005

  caused by myshandling underdocumented then 'ctags' feature.  This
  patch DOES NOT however resolve deeper fundamental problem with error
  / exception handling in gitweb after some data was already sent to a
  browser.

  It also removes gitweb half of interface for adding content tags
  (labels) to a project; it was quarter of feature at best (there
  is/was no example implementation of server side half of adding
  content tags, no way to delete or fix content tags).

* [PATCH 3/6] gitweb: Mark matched 'ctag' / contents tag (?by_tag=foo)

  This is simple improvement, done while working on 'ctags' feature.

* [PATCH 4/6] gitweb: Split git_project_list_body in two functions
  [PATCH 5/6] gitweb: Modularized git_get_project_description to be more generic

  Those two patches are refactoring preparing way for project
  categories (for the next patch).

* [PATCH 6/6] gitweb: Optional grouping of projects by category

  Port of Sebastien Cevey port of Sham Chukoury's patch for the XMMS2
  gitweb to modern gitweb.

Shortlog:
~~~~~~~~~
Jakub Narebski (3):
  gitweb: Restructure projects list generation
  gitweb: Change the way "content tags" ('ctags') are handled
  gitweb: Mark matched 'ctag' / contents tag (?by_tag=foo)

Sebastien Cevey (3):
  gitweb: Split git_project_list_body in two functions
  gitweb: Modularized git_get_project_description to be more generic
  gitweb: Optional grouping of projects by category

Diffstat:
~~~~~~~~~
 gitweb/README                             |   16 +
 gitweb/gitweb.perl                        |  546 ++++++++++++++++++++---------
 gitweb/static/gitweb.css                  |    7 +
 t/t9500-gitweb-standalone-no-errors.sh    |   57 +++
 t/t9502-gitweb-standalone-parse-output.sh |   74 ++++
 5 files changed, 542 insertions(+), 158 deletions(-)