ssh-push.con commit git-diff A...B to (usually) mean "git-diff `git-merge-base A B` B" (9919f41)
   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"