[test suite] added popen() 'n' answer test
[test suite] save pkt to file tests
[client] minor update to comment out unused function
[test suite] fwknoprc GPG tests, more time offset tests
[client] minor typo fix for -P requirement under spoofed src mode
[test suite] added --key-rijndael and --key-hmac tests
[libfko] add GPG sig status to fko dump context function
[libfko] remove unused digest *_End(), *_Data(), and *_hex() functions in favor of better test coverage (always can be reinstantiated if needed)
[client] return error exit status if --stanza-list cannot open the rc file
[test suite] add several validation tests to exercise various client/config_init.c lines