gnutls installs empty man page

The usr/share/man/man3/gnutls_x509_trust_list_add_system_trust.3.gz file provided by the package is empty since gnutls-3.5.3.

Rebuilding man page index:
makemandb: Error while reading `/usr/pkg/man/man3/gnutls_x509_trust_list_add_system_trust.3': Unrecognized archive format