ports-mgmt/pkg-devel: update to 1.20.99.5
Changes:
- fix a regression introduce with switch to libcurl which results in the remote db mtime being badly set
- fix a regression which makes pkg query report twice some packages when configured in multirepository mode.
- fix a compatibility issue with http_proxy env var (lowercase)
- update libcurl to latest version
- introduce PKG_EVENT_PKG_ERRNO new event type