aii-dhcp fixes for handling conf files without subnet paramaters

aii-dhcp fixes applied to both aii-dhcp and the new dhcp module but really tested only for aii-dhcp...

Also includes:
- addition of a rpms.pan for aii-core and aii-dhcp (not included by default by any other templates)
- Removal of remaining .cin files
- Renaming of remaining .tpl fles to .pan
- Addition of aii-server config examples to RPM (moved to src/main/eg)