Portability cleanup setsockopt() calls

[yadij]

error: cannot convert 'int*' to 'const char*'

Ensure that parameter 4 is cast properly to char* which is known to be compatible with all known API declarations for this function.

Ensure that parameter 5 is passed the size of object in parameter 4 whenever possible, instead of the theoretical type size.

[yadij]

This change is independant of the changes in PR #1341

[yadij]

Waiting on PR #1373

[yadij]

No longer going to wait for PR #1373 which has already started devolving into requests for perfection.