| Subject: | replace uses of Getopt::Std with Getopt::Long |
Getopt::Std was the original very simplistic command-line option processing module. It is now obsoleted by the much more complete solution Getopt::Long, which also supports short options, and is wrapped by modules such as Getopt::Long::Descriptive and Getopt::Long::Modern for simpler usage.
(quote from Perl::Critic::Policy::Freenode::DiscouragedModules)