Subject: Building git with NO_PERL=1 will install git-submodule, which depends on perl

From: Tomas Carnecky <[email-masked]>
Date: Sun, 24 Feb 2013 22:12:19 +0000

Compare with git-instaweb which is replaced by as a small shell script which
informs the user that the functionality is not implemented.

I've only checked git-submodule, other commands may also have an undocumented
dependency on perl.