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. 4d1f119 [PATCH] Unify usage strings declaration by Petr Baudis · 20 years ago
2. e35f982 [PATCH] mmap error handling by Pavel Roskin · 20 years ago
3. 3c84974 [PATCH] Fixlets on top of Nico's clean-up. by Junio C Hamano · 20 years ago
4. 75c42d8 Add a "max_size" parameter to diff_delta() by Linus Torvalds · 20 years ago
5. a310d43 [PATCH] Deltification library work by Nicolas Pitre. by Nicolas Pitre · 20 years ago