Add new Yealink time zone variables and update existing ones adding 'yealink_' as a prefix.

resources/templates/provision/yealink/t46g/y000000000028.cfg

@@ -1377,8 +1377,8 @@ gui_lang.delete =
 #The default time zone name is China(Beijing).
 #local_time.time_zone = +8
 #local_time.time_zone_name = China(Beijing) 
-local_time.time_zone = {$time_zone}
-local_time.time_zone_name = {$time_zone_name}
+local_time.time_zone = {$yealink_time_zone}
+local_time.time_zone_name = {$yealink_time_zone_name}
 
 #Configure the domain name or the IP address of the NTP server. The default value is cn.pool.ntp.org.
 local_time.ntp_server1 = {$ntp_server_1}
@@ -1397,19 +1397,19 @@ local_time.dst_time_type =
 #If the DST type is configured as By Date, the value format is Month/Day/Hour. For example, the value 5/20/10 means the start time is at 10:00 on May 20.  
 #If the DST type is configured as By Week, the value format is Month/Day of Week/Day of Week Last in Month/Hour of Day. 
 #For example, the value 1/4/2/5 means the start time is at 5 o'clock on Tuesday of the 4th week in January.
-local_time.start_time = {$time_zone_start_time}
+local_time.start_time = {$yealink_time_zone_start_time}
 
 #Configure the end time of DST. The default value is 12/31/23. The value format is the same to the start time.
-local_time.end_time = {$time_zone_end_time}
+local_time.end_time = {$yealink_time_zone_end_time}
 
 #Configure the offset time (in seconds). It ranges from -300 to 300, the default value is blank.
-local_time.offset_time = 
+local_time.offset_time = {$yealink_offset_time}
 
 #Configure the time format; 0-12 Hour, 1-24 Hour (default);
-local_time.time_format = 
+local_time.time_format = {$yealink_time_format}
 
 #Configure the date format; 0-WWW MMM DD (default), 1-DD-MMM-YY, 2-YYYY-MM-DD, 3-DD/MM/YYYY, 4-MM/DD/YY, 5-DD MMM YYYY, 6-WWW DD MMM;
-local_time.date_format = 
+local_time.date_format = {$yealink_date_format}
 
 #Enable or disable the DHCP Time; 0-Disabled (default), 1-Enabled;
 local_time.dhcp_time =