Description:

$conf = myconfig ()
This function will collect the data described in the the hash structure
manpage below, and return that as a hash reference. It optionally
accepts an option to include more entries from %ENV. See the
environment manpage below.

Note that this will not work on uninstalled perls when called with
'-I/path/to/uninstalled/perl/lib', but it works when that path is in
'$PERL5LIB' or in '$PERL5OPT', as paths passed using '-I' are not known
when the '-V' information is collected.

$conf = plv2hash ($text [, ...])
Convert a sole 'perl -V' text block, or list of lines, to a complete
myconfig hash. All unknown entries are defaulted.