Integrated the log module in the whol client source code.

perror() is also replaced by log_msg()
Merge remote-tracking branch 'upstream/master'
Added tests for the SPA_SERVER_PROTO variable from an rc file.
Started on --save-rc-stanza tests, client bug fix for HMAC verification in --test mode
ChangeLog and credits updates for Franck
[client] add USE_HMAC handling to parse_rc_param()