Add variables to Grandstream and Yealink Templates (#6400)

* Grandstream HT802 Added Offhook Auto-dial variables

* Grandstream HT802 Added Offhook Auto-dial variables

* Grandstream GRP261x Make Configuration Keypad Lock configurable, fix default

* Grandstream Add grandstream_dhcp_time_zone across all templates

* Yealink Added yealink_missed_calllog to control whether missed calls are logged or not

* Grandstream HT802 update variable name to not use dash (which was breaking the template)

resources/templates/provision/grandstream/ht802/{$mac}.xml

@@ -882,7 +882,7 @@
     <!-- # Offhook Auto-Dial (User ID/extension to dial automatically when offhook) -->
     <!-- # String: 0-9, #, * -->
     <!-- # Mandatory -->
-    <P71></P71>
+    <P71>{grandstream_offhook_auto_dial_1}</P71>
 
     <!-- # Offhook Auto-Dial Delay (0-60 seconds, default is 0) -->
     <!-- # Number: 0 to 60 -->
@@ -1779,7 +1779,7 @@
 
     <!-- # Offhook Auto-Dial (User ID/extension to dial automatically when offhook) -->
     <!-- # String: 0-9, *, # -->
-    <P771></P771>
+    <P771>{grandstream_offhook_auto_dial_2}</P771>
 
     <!-- # Offhook Auto-Dial Delay (0-60 seconds, default is 0) -->
     <!-- # Number: 0 to 60 -->
@@ -2575,7 +2575,7 @@
     <!-- # Allow DHCP server to set Time Zone. 0 - No, 1 - Yes -->
     <!-- # Number: 0, 1 -->
     <!-- # Mandatory -->
-    <P143>1</P143>
+    {if isset($grandstream_dhcp_time_zone)}<P143>{$grandstream_dhcp_time_zone}</P143>{else}<P143>0</P143>{/if}
 
     <!-- # Language. 0 - English, 4 - Chinese, 6 - Russian, 10 - Spanish IVR -->
     <!-- # Number: 0, 4, 6, 10 -->