MFH: r413652 r414124

Merge the GnuTLS and libgcrypt OPTIONS into one as both are required
for decryption support.

PR: 208830

Update to 2.0.3.

See https://www.wireshark.org/docs/relnotes/wireshark-2.0.3.html for the
list of changes in this release.

Security: https://vuxml.FreeBSD.org/freebsd/7e36c369-10c0-11e6-94fa-002590263bf5.html
Approved by: ports-secteam (with hat)