Add config file parsing module and initial option set

dkimpy-milter.conf

@@ -18,9 +18,8 @@ Selector		default
 # Commonly-used options; the commented-out versions show the defaults.
 #Canonicalization	simple
 #Mode			sv
-#SubDomains		no
 
-# Socket smtp://localhost
+# Socket local:/var/run/dkimpy-milter/dkimpy-milter.sock
 #
 # ##  Socket socketspec
 # ##
@@ -34,23 +33,15 @@ Selector		default
 Socket			inet:8892@localhost
 
 ##  PidFile filename
-###      default (none)
+###      default /var/run/dkimpy-milter/dkimpy-milter.pid
 ###
 ###  Name of the file where the filter should write its pid before beginning
 ###  normal operations.
 #
 PidFile			/var/run/dkimpy-milter/dkimpy-milter.pid
 
-
-# Always oversign From (sign using actual From and a null From to prevent
-# malicious signatures header fields (From and/or others) between the signer
-# and the verifier.  From is oversigned by default in the Debian pacakge
-# because it is often the identity key used by reputation systems and thus
-# somewhat security sensitive.
-OversignHeaders		From
-
 ##  Userid userid
-###      default (none)
+###      default dkimpy-milter
 ###
 ###  Change to user "userid" before starting normal operation?  May include
 ###  a group ID as well, separated from the userid by a colon.