MULT: Get rid of SMTP username, maildaemon script done

Lot of stuff in this one. 

Maildaemon seems to be working. Moved SMTP_PASS to 
config file from its own file, so one less file to have. 
Probably need to have some input validation on the 
SMTP_INTERVAL value, but I'll do that right quick after getting
the Config.cpp changes into integration. 

Added renderError redirect for rsyslog_helper failure, won't fail
silently anymore. 

Got rid of SMTP_USERNAME, it was redundant.

close #784
close #779