[perl #113932] UNIVERSAL::can with globs and globrefs

(Also perl #118105.)

This allows *ARGV->can("print") to work as long as IO::Handle is
loaded.  This translates into UNIVERSAL::can(\*ARGV,"print").  This
commit also changes UNIVERSAL::can to accept a plain *ARGV as well.

UNIVERSAL::can("ARGV",...) is left as it is (ARGV is treated as a pack-
age name), because changing that requires a bigger patch, and I don’t
know when I will get to it.
perldelta: consistent spaces after dots
perldelta template: consistent spaces after dots

(pod2man or nroff [whichever] treats a dot at the end of a line
as a dot followed by two spaces.)