GIT 0.99.7c

Contains the following post-0.99.7b fixes:

 - rsh.c string termination fix by H. Peter Anvin
 - further fetch fixes by Sergey Vlasov
 - diff-tree documentation by Robert Watson.
 - 'git diff --cached' synonymous to 'git diff --cached HEAD'.
 - subprocess.py licensing status clarification.

Signed-off-by: Junio C Hamano <junkio@cox.net>

1. e99d59f sparse cleanup by Linus Torvalds · 20 years ago
2. 9dc527a [PATCH] fix strbuf take #2 by Junio C Hamano · 20 years ago
3. ad87de7 strbuf: allow zero-length lines by Linus Torvalds · 20 years ago
4. 812666c [PATCH] introduce xmalloc and xrealloc by Christopher Li · 20 years ago
5. d1df574 [PATCH] Introduce diff-tree-helper. by Junio C Hamano · 20 years ago