Merge branch 'master' of git://git.kernel.org/pub/scm/git/git

Merge branch 'master' of git://git./git/git

* 'master' of git://git.kernel.org/pub/scm/git/git: (26 commits)
  GIT 1.5.5-rc1
  gc --auto: raise default auto pack limit from 20 to 50
  remote.c: Fix overtight refspec validation
  fast-import: Document the effect of "merge" with no "from" in a commit
  Make git-svn tests behave better on OS X
  Improve description of git filter-branch.
  t/t7003-filter-branch.sh: use test_must_fail rather than '!'
  Don't try and percent-escape existing percent escapes in git-svn URIs
  remote show: do not show symbolic refs
  Document the sendemail.smtpserverport config variable
  Add --reverse to the git-rev-list usage string
  make it easier for people who just want to get rid of 'git gc --auto'
  builtin-gc.c: allow disabling all auto-gc'ing by assigning 0 to gc.auto
  Documentation/git-merge: document subtree strategy.
  Fix tag following
  Make revision limiting more robust against occasional bad commit dates
  Fix t3200 config
  Tighten refspec processing
  Fix possible Solaris problem in 'checkout_entry()'
  Fix read-tree not to discard errors
  ...