* Fixed WriteProperty error code for PROP_FD_BBMD_ADDRESS and PROP_FD_SUBSCRIPTION_LIFETIME properties.
* Fixed dead-code warning after enabling all datalinks for basic network port object using the property list as the R/W checking for the port type.
* Improved GCC compiler flags in ARM, OS, and test builds. Removed redundant flags, and made them consistent across various builds.
* Fixed redundant redeclaration of various functions detected by change in compiler flags.
* Fixed string truncation warning in bip-init detected by change in compiler flags.
* Fixed some set-but-not-used variables by creating dummy functions instead of using macros.
* Fixed example app router-ipv6 to build under ports/win32
* Fixed example app router-mstp to build under ports/win32 with MinGW
* Added win32 builds of router-ipv6 and router-mstp to the Github pipeline
Steve Karg