* Enable CI for libspatialite:x64-windows-static-md
* Use pkgconfig for nmake
* Use pkgconfig for autotools; fix mingw
* Install pc file for windows
* Add feature interface, make GPLv2+ features optional
* spatialite-tools need libspatialite[rttopo]
* Update versions
* Modernize portfile
* Update indentation
* Update to 5.0.1
* Don't enable legacy PROJ API on Windows
* Fix copyright
* Update versions
Co-authored-by: Billy Robert O'Neal III <bion@microsoft.com>