fixed several socket handle leaks under error conditions spotted by Coverity
[test suite] README update to include --enable-complete mode
[test suite] update wrapper Makefile gcc -> cc
[test suite] handle PF on FreeBSD
[test suite] add access.conf file path to a few basic tests
[client] make close() on socket handle more intuitive (resolves 'double close' bugs flagged by Coverity)
added extras/coverity/ directory for Coverity script
[client] call freeaddrinfo() early after iterating through getaddrinfo() results