Reviewed-by: Richard Levitte <levitte@openssl.org>

PR: 2963 and a number of others

vpaes-x86_64.pl: minor performance squeeze.

path with spaces.

PR: 2835

be done, it's definitely not the way to do it. So far answer to the
question was to ./config -Wa,--noexecstack (adopted by RedHat).

PR: 1801
Submitted by: Huang Ying

T[ed]4 prefetch.

prefetch could have been moved closer to Td4 references. Something for
later consideration...