integrate changes 1835,2003,2067 and File::Find change in 1938

integrate changes 1835,2003,2067 and File::Find change in 1938
warn on C<my($foo,$foo)>

silence -w noises (suggested by Greg Bacon) Term::Complete
Message-ID: <36380269.55370608@smtp1.ibm.net>
Subject: Make _really_ sure Dynaloader.xs code is initialized only once

p4raw-id: //depot/maint-5.005/perl@2171
p4raw-integrated: from //depot/maint-5.004/perl@2170 'copy in'
	lib/File/Find.pm (@1017..)
p4raw-integrated: from //depot/perl@2170 'copy in'
	ext/DynaLoader/DynaLoader_pm.PL (@1108..) lib/Term/Complete.pm
	(@1575..)