Integrate change #11519 from perlio:
Jarkko Hietaniemi [Thu, 9 Aug 2001 11:08:51 +0000 (11:08 +0000)]
Avoid testing for (non-)existance of "encoding(xxxx)"
layer is called "encoding" the (xxxx) is an argument.

p4raw-link: @11519 on //depot/perl: cb7ddd31f93d0675b449b95767297ddc411dbc09

p4raw-id: //depot/perl@11617


Trivial merge