Update to version 1.5.5.1.  No pkgsrc changes, this time.

GIT v1.5.5.1 Release Notes
==========================

Fixes since v1.5.5
------------------

* "git archive --prefix=$path/" mishandled gitattributes.

* "git fetch -v" that fetches into FETCH_HEAD did not report the summary
  the same way as done for updating the tracking refs.

* "git svn" misbehaved when the configuration file customized the "git
  log" output format using format.pretty.

* "git submodule status" leaked an unnecessary error message.

* "git log --date-order --topo-order" did not override the earlier
  date-order with topo-order as expected.

* "git bisect good $this" did not check the validity of the revision
  given properly.

* "url.<there>.insteadOf" did not work correctly.

* "git clean" ran inside subdirectory behaved as if the directory was
  explicitly specified for removal by the end user from the top level.

* "git bisect" from a detached head leaked an unnecessary error message.

* "git bisect good $a $b" when $a is Ok but $b is bogus should have
  atomically failed before marking $a as good.

* "git fmt-merge-msg" did not clean up leading empty lines from commit
  log messages like "git log" family does.

* "git am" recorded a commit with empty Subject: line without
  complaining.

* when given a commit log message whose first paragraph consists of
  multiple lines, "git rebase" squashed it into a single line.

* "git remote add $bogus_name $url" did not complain properly.

*  Also comes with various documentation updates.

(bjs)