cvsimport: modernize callouts to git subcommands
cvsimport: modernize callouts to git subcommands

This patch updates all calling conventions for external git tools.  to
use the modern calling convention (eg: git foo instead of git-foo).
This is almost entierly a s/git-/git / operation, with deviations only
as required to keep tests passing.

Reported-by: Alexander Maier <872224b22b712ba30c124faf56d8e2ab96b2d2de@opencsw.org>
Signed-off-by: Ben Walton <6f9de98cc1f3d6d6e7da9953ca2250e07ad38e43@artsci.utoronto.ca>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git