* new port for libical
* ports/libical/portfile.cmake - cleanup
* [libical] implement fixes from pull request
* [libical] update to 3.0.11, modernize port file
* [libical] make rscale a default feature
* [libical] update versions
* [libical] don't make rscale deault for now, disable on static
* [libical] update versions
Co-authored-by: Allen Winter <allen.winter@kdab.com>