The attached patch updates xxxterm to version 1.1518. 

The version in ports doesn't build and is not fetchable. The build error:

xxxterm.o: In function `free_connection_certs':
xxxterm.c:(.text+0x5db0): undefined reference to `gnutls_x509_crt_deinit'
xxxterm.o: In function `get_connection_certs':
xxxterm.c:(.text+0x5dea): undefined reference to `gnutls_certificate_type_get'
xxxterm.c:(.text+0x5e0e): undefined reference to `gnutls_certificate_get_peers'
xxxterm.c:(.text+0x5e4e): undefined reference to `gnutls_x509_crt_init'
xxxterm.c:(.text+0x5e6a): undefined reference to `gnutls_x509_crt_import'
xxxterm.o: In function `stop_tls':
xxxterm.c:(.text+0x5eb0): undefined reference to `gnutls_deinit'
xxxterm.c:(.text+0x5ebc): undefined reference to `gnutls_certificate_free_credentials'
xxxterm.o: In function `save_certs':
xxxterm.c:(.text+0x90b4): undefined reference to `gnutls_x509_crt_export'
xxxterm.o: In function `start_tls':
xxxterm.c:(.text+0x91e4): undefined reference to `gnutls_certificate_allocate_credentials'
xxxterm.c:(.text+0x9200): undefined reference to `gnutls_certificate_set_x509_trust_file'
xxxterm.c:(.text+0x9213): undefined reference to `gnutls_init'
xxxterm.c:(.text+0x922e): undefined reference to `gnutls_priority_set_direct'
xxxterm.c:(.text+0x9248): undefined reference to `gnutls_credentials_set'
xxxterm.c:(.text+0x925a): undefined reference to `gnutls_transport_set_ptr'
xxxterm.c:(.text+0x9265): undefined reference to `gnutls_handshake'
xxxterm.c:(.text+0x9276): undefined reference to `gnutls_auth_get_type'
xxxterm.c:(.text+0x92c4): undefined reference to `gnutls_strerror_name'
xxxterm.c:(.text+0x92ce): undefined reference to `gnutls_error_is_fatal'
xxxterm.o: In function `load_compare_cert':
xxxterm.c:(.text+0x94d3): undefined reference to `gnutls_x509_crt_export'
xxxterm.o: In function `show_certs':
xxxterm.c:(.text+0xc08f): undefined reference to `gnutls_free'
xxxterm.c:(.text+0xc0c0): undefined reference to `gnutls_x509_crt_print'
xxxterm.o: In function `ca_cmd':
xxxterm.c:(.text+0xc426): undefined reference to `gnutls_x509_crt_list_import'
xxxterm.o: In function `main':
xxxterm.c:(.text+0xef6d): undefined reference to `gnutls_global_init'
xxxterm.c:(.text+0xf5c8): undefined reference to `gnutls_global_deinit'
*** Error code 1

Stop in /usr/ports/www/xxxterm/work/xxxterm-1.425/freebsd.
*** Error code 1

Stop in /usr/ports/www/xxxterm.

Fix: Patch attached with submission follows: