Better error message.
No longer print file name of redundant rules.
Tests read code from directory, not from STDOUT.
Implemented mode for error checks.

If netspoc is called without an out-directory,
code isn't written to STDOUT any longer.
Only error checks are done.
Added "return" statements for perlcritic
Call gen_reverse_rules even in fast_mode.

We need this to get reversed rules be checked for this check error
condition: Dynamic NAT address is used in ACL at managed router at the
border of the zone of $obj.
v3.047

 - Implemented mode for faster error checks.
   If netspoc is called without an out-directory,
   code isn't written to STDOUT any longer.
   Only error checks are done.
 - Allow pfs group5 for ASA.