Add first cut at "git protocol" connect logic.

Useful for pulling stuff off a dedicated server.  Instead of connecting
with ssh or just starting a local pipeline, we connect over TCP to the
other side and try to see if there's a git server listening.

Of course, since I haven't written the git server yet, that will never
happen.  But the server really just needs to listen on a port, and
execute a "git-upload-pack" when somebody connects.

(It should read one packet-line, which should be of the format

	"git-upload-pack directoryname\n"

and eventually we migth have other commands the server might accept).

1 files changed, 10 insertions, 0 deletions

diff --git a/cache.h b/cache.h
index 1376700f19..a42ce7e3f5 100644
--- a/cache.h
+++ b/cache.h
@@ -41,6 +41,16 @@
 #endif
 
 /*
+ * Intensive research over the course of many years has shown that
+ * port 9418 is totally unused by anything else. Or
+ *
+ *	Your search - "port 9418" - did not match any documents.
+ *
+ * as www.google.com puts it.
+ */
+#define DEFAULT_GIT_PORT 9418
+
+/*
  * Environment variables transition.
  * We accept older names for now but warn.
  */