define _XOPEN_SOURCE_EXTENDED to reach fd_set and timeval types and
functionality.

and avoid MD5 dependency.

ancient SSLeay format.

cause "make test" failures and make resource leaks more obvious.

minimum requirement for committed code. Added to debug-steve* config targets
for now.

Some #include statements were not properly protected. This will go unnoted
on most systems as openssl/comp.h tends to be installed as a system header
file by default but may become visible when cross compiling.

shell ones.

test). (Coverity ID 148).

test for them!

(Coverity ID 135).