PT44557741 Grandstream Plugin Fixes
This patch fixes the following Grandstream Plugin Issues:
- Added autoprovision support for handytone and GXW analog gateways
- Added support for GXW4024 gateway
- Fixed missing firmware upload for GXP1450
- Fixed character substitution problem
- Fixed broken HT704 support - Fixed UDP/TCP/TLS parameter

Patch from Josh Patten - thanks!