ssh-push.con commit merge with /dev/null as base, instead of punting O==empty case (f7d24bb)
   1#define COUNTERPART_ENV_NAME "GIT_SSH_PULL"
   2#define COUNTERPART_PROGRAM_NAME "git-ssh-pull"
   3#define MY_PROGRAM_NAME "git-ssh-push"
   4#include "ssh-upload.c"