Prevent duplicate error "Inconsistent NAT in loop"
Merge branch 'master' of https://github.com/hknutzen/Netspoc
Fixed error message.
Fixed quotes of here documents.
Added 'owner' attribute at 'vip' interface.
Fixed "!=" to "ne".
Merge branch 'master' of https://github.com/hknutzen/Netspoc
v3.050

 - Allow 'owner' attribute at 'vip' interface.
 - Simplified syntax of IP addresses:
   Valid: "ip = ip/prefixlen;"
   Now invalid: "ip = ip; mask = mask;", "ip = ip/mask;"
 - Fixed check for inconsistent NAT in loop.
 - Fixed minor bug in path_walk at pathrestriction at exit of loop.