"git -p cmd" to page anywhere

This allows you to say:

	git -p diff v2.6.16-rc5..

and the command pipes the output of any git command to your pager.

[jc: this resurrects a month old RFC patch with improvement
 suggested by Linus to call it --paginate instead of --less.]

Signed-off-by: Junio C Hamano <junkio@cox.net>

git.c

@@ -251,6 +251,11 @@ int main(int argc, const char **argv, char **envp)
 		cmd = *++argv;
 		argc--;
 
+		if (!strcmp(cmd, "-p") || !strcmp(cmd, "--paginate")) {
+			setup_pager();
+			continue;
+		}
+
 		if (strncmp(cmd, "--", 2))
 			break;