Premising that Remarkup supports a fully-featured cowsay generator (!)... since 2015 this awesome
thing no longer requires a binary cowsay command, since everything was rewritten in the core:
So, some files from the legacy cowsay version in Perl can be safely removed.
We still thank the original author Tony Monroe for the original version in Perl (dated 2000),
and Evan Priestley for the re-implementation in PHP.
Probably nobody knows about this feature. This may change in the future. See T15401.