Merge branch 'jt/connected-show-missing-from-which-side' into seen

We may find an object missing after a "git fetch" stores the
objects it obtained from the other side, but it is not necessarily
because the remote failed to send necessary objects.  Reword the
messages in an attempt to help users explore other possibilities
when they hit this error.

* jt/connected-show-missing-from-which-side:
  fetch,fetch-pack: clarify connectivity check error

Author: gitster

builtin/fetch.c

@@ -1138,7 +1138,7 @@ static int store_updated_refs(const char *raw_url, const char *remote_name,
 
 		rm = ref_map;
 		if (check_connected(iterate_ref_map, &rm, &opt)) {
-			rc = error(_("%s did not send all necessary objects\n"), url);
+			rc = error(_("connectivity check failed after fetching from %s\n"), url);
 			goto abort;
 		}
 	}

fetch-pack.c

@@ -2047,7 +2047,7 @@ struct ref *fetch_pack(struct fetch_pack_args *args,
 		if (args->deepen)
 			opt.is_deepening_fetch = 1;
 		if (check_connected(iterate_ref_map, &iterator, &opt)) {
-			error(_("remote did not send all necessary objects"));
+			error(_("connectivity check failed after fetching from remote"));
 			free_refs(ref_cpy);
 			ref_cpy = NULL;
 			rollback_shallow_file(the_repository, &shallow_lock);