Git 1.7.9.4

This is hopefully the final maintenance release before 1.7.10 happens, and merges four low impact fixes relative to the previous 1.7.9.3 release.

• The code to synthesize the fake ancestor tree used by 3-way merge fallback in "git am" was not prepared to read a patch created with a non-standard -p<num> value.
• "git bundle" did not record boundary commits correctly when there are many of them.
• "git diff-index" and its friends at the plumbing level showed the "diff --git" header and nothing else for a path whose cached stat info is dirty without actual difference when asked to produce a patch. This was a longstanding bug that we could have fixed long time ago.
• "gitweb" did use quotemeta() to prepare search string when asked to do a fixed-string project search, but did not use it by mistake and used the user-supplied string instead.

Have fun.