Replace slashes in the parameter string

Also remove duplicate documentation

windows/win_nssm.ps1

@@ -149,7 +149,9 @@ Function ParseAppParameters()
         [string]$appParameters
     )
 
-    return ConvertFrom-StringData -StringData $appParameters.TrimStart("@").TrimStart("{").TrimEnd("}").Replace("; ","`n")
+    $escapedAppParameters = $appParameters.TrimStart("@").TrimStart("{").TrimEnd("}").Replace("; ","`n").Replace("\","\\")
+
+    return ConvertFrom-StringData -StringData $escapedAppParameters
 }
 
 

windows/win_nssm.py

@@ -86,11 +86,6 @@ options:
       - Password to be used for service startup
     required: false
     default: null
-  password:
-    description:
-      - Password to be used for service startup
-    required: false
-    default: null
   start_mode:
     description:
       - If C(auto) is selected, the service will start at bootup. C(manual) means that the service will start only when another service needs it. C(disabled) means that the service will stay off, regardless if it is needed or not.