Add support for Bitrig BSD

Signed-off-by: Chris 'BinGOs' Williams <chris@bingosnet.co.uk>
Tweak the perl build some

Fix the cross makefile.  makefile.SH treat us like openbsd.

hints/bitrig.sh: remove all version number detection goop. this is for
openbsd versions that are currently *higher* then the bitrig version
number, so avoid foot shooting by throwing it out.

Signed-off-by: Chris 'BinGOs' Williams <chris@bingosnet.co.uk>
Apply bitrig change to lib/locale.t too

This change appears to have entered the bitrig source tree via
openbsd source merge.
Add Marco Peereboom and Owain G. Ainsworth to AUTHORS
Update perldelta for Bitrig platform support