port1.0: Allow /var/db/mds/system in trace mode
port1.0: Allow /var/db/mds/system in trace mode

/var/db/mds/system is used when loading the system certificate store, so
allow it in trace mode. This fixes trace mode builds using the haskell
stack build system, which downloads things during the build phase.

Additionally, remove a trailing slash from the entry for
/var/db/timezone/zoneinfo, which seems to have prevented it from working
correctly.

neverpanic/macports-base,neverpanic/macports-base,danchr/macports-base,danchr/macports-base,macports/macports-base,macports/macports-base