Merge remote-tracking branch 'fjoncourt/save_rc_stanza'

Closes issues #81 and #82 thanks to Franck.
Use {0} initializer for all stack allocated char arrays

Lots of places in the code were already using {0} to initialize stack char
arrays, but memset() was being used as well.  This commit removes all
unnecessary memset() calls against char arrays that are already initialized
via {0} (which sets all members to zero for such arrays).
man page updates - access.conf section now includes variable guidance
[test suite] minor formatting update to access.conf files to mimic fwknoprc vars (no colon or trailing semicolon)
Set command line argument bitmask as a 64-bits value to be able to handle more arguments.

 Interim commit to add the VERBOSE variable to be stored in the fwknoprc file when
 -v is used with --save-rc-stanza. The VERBOSE variable is also read by fwknop
 and the verbosity level is set accordingly.