Main:All Added per CMS config for sub-modules

If CMS is installed and a sub-module requires to be configured per CMS,
this is handeled by new 'CMSHook-(pre)conf.sh'
this has been added to Dev Docs

Updated postfix sub-module to use new CMSHook
Added 'itype' var for detection of install script type
Now also storeing  'Allways on modules' in installer as EnabledAons

Docs/docs/Dev-Adding-Modules.md

@@ -14,6 +14,8 @@ In both cases the file structure is expected as shown below
 * `<Webserver>`-apt.pkg.list
 * `<Webserver>`-dnf.pkg.list
 * config/*
+* CMSHook-preconf.sh
+* CMSHook-conf.sh
 
 ## The internal module location
 SubModules/`<ModuleName>`
@@ -32,7 +34,8 @@ SubModules/`<ModuleName>`
 | `<Webserver>`-apt.pkg.list | packagelist for specified webserver for distro's that use apt|
 | `<Webserver>`-dnf.pkg.list | packagelist for specified webserver for distro's that use dnf/yum|
 | config/* | Directory for config files | 
-
+| CMSHook-conf.sh  | Will run as addtional preconf when CSM is installed|
+| CMSHook-conf.sh  | Will run after a CSM is installed|
 
 # Defining in the menu
 ### Add the following to ModulesMenu.list