the option dialog presents that SSL decryption is enabled if you add GnuTLS support, while both their documentation https://wiki.wireshark.org/SSL and an actual test shows that you won't be able to decrypt SSL payloads unless you have both GnuTLS and gcrypt support in wireshark.
Fixed. Thanks for the report.
A commit references this bug: Author: marcus Date: Tue Apr 19 15:33:46 UTC 2016 New revision: 413652 URL: https://svnweb.freebsd.org/changeset/ports/413652 Log: Merge the GnuTLS and libgcrypt OPTIONS into one as both are required for decryption support. PR: 208830 Changes: head/net/wireshark/Makefile
A commit references this bug: Author: junovitch Date: Tue May 3 00:01:22 UTC 2016 New revision: 414495 URL: https://svnweb.freebsd.org/changeset/ports/414495 Log: 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) Changes: _U branches/2016Q2/ branches/2016Q2/net/wireshark/Makefile branches/2016Q2/net/wireshark/distinfo branches/2016Q2/net/wireshark/pkg-plist