Compatible with OpenWrt 21.02 (Issue #18)

Switch to CMake
New --net-time option
Rename option "authexe" to "onlinehook"

Add detection for temporarily unavailable heartbeat server.
Remove procd respawn parameter in OpenWrt init script.
Use hotplug script to start client after initialization of network.

Retry when receive falilure from the server.
Build-in scheduled restart.(experimental)
Code cleanup.

• Remove hard-coded UCI shell commands
• Fix issue #7 #8
• More friendly OpenWrt Makefile for developers
• UNIX style CLI, please consult README.md for details

This version should be compatible with other Linux distribution such as Merlin.

Fix compatibility with musl on LEDE

Fix restart issues in openwrt init script.
Fix UDP heartbeat's crc error.
Compatible with HiWiFi SDK.
If you want to use interface-triggered restart, set option "plugin_redial" to 1 and set "enable" to 0 to avoid multi-dialing.