Merge branch 'maint'

* maint:
GIT 1.6.4.3
svn: properly escape arguments for authors-prog
http.c: remove verification of remote packs
grep: accept relative paths outside current working directory
grep: fix exit status if external_grep() punts

Conflicts:
GIT-VERSION-GEN
RelNotes

diff --cc builtin-grep.c
Simple merge

diff --cc git-svn.perl
Simple merge

diff --cc grep.h
Simple merge

diff --cc http.c
Simple merge

diff --cc t/t7002-grep.sh
Simple merge