integrate changes#2304,2305,2306,2308 from maint-5.005

integrate changes#2304,2305,2306,2308 from maint-5.005

p4raw-link: @2308 on //depot/maint-5.005/perl: d9ff4e059542b05c512829c494eaa4d1a8c96869
p4raw-link: @2306 on //depot/maint-5.005/perl: 82bf2b55a275313af7da5198d3567127a2b619bb
p4raw-link: @2305 on //depot/maint-5.005/perl: fa8a3fc69bb318b2e84481c2b7919cb81c822866
p4raw-link: @2304 on //depot/maint-5.005/perl: 566aa6395795ff6a5a86565ea7a90bf3211e26a1

p4raw-id: //depot/perl@2326
p4raw-integrated: from //depot/maint-5.005/perl@2325 'copy in'
	ext/DynaLoader/dl_mpeix.xs lib/ExtUtils/typemap (@1649..)
	installperl (@2134..) lib/ExtUtils/MM_VMS.pm
	lib/ExtUtils/MakeMaker.pm (@2154..) lib/ExtUtils/MM_Unix.pm
	(@2304..)