Log message:
Bump for perl-5.20.0.
Do it for all packages that
* mention perl, or
* have a directory name starting with p5-*, or
* depend on a package starting with p5-
like last time, for 5.18, where this didn't lead to complaints.
Let me know if you have any this time.

Log message:
Import Return-MultiLevel-0.03 as devel/p5-Return-MultiLevel.

Return::MultiLevel provides a way to return immediately from a deeply
nested call stack. This is similar to exceptions, but exceptions don't
stop automatically at a target frame (and they can be caught by
intermediate stack frames). In other words, this is more like
setjmp(3)/longjmp(3) than die.