Log Message:
net/sslh: update to 1.22c

- sslh-select now supports UDP protocols. Probes specified in the
  protocols configuration entry are tried on incoming packets, TCP or
  UDP, and forwarded based on the input protocol (an incoming TCP
  connection will be forwarded as TCP, and same with UDP). This has been
  tested with DNS as shown in udp.cfg: incoming packets that contain my
  domain name are assumed to be a DNS request and forwarded accordingly.
  Note this could cause problems if combined with incoming TLS with SNI.
  UDP clients and servers need to agree on the IPv4/IPv6 they use: use
  the same protocol on all sides! Often, this means explicitely using
  `ip4-localhost'. UDP sender-receiver pairs (connections, so to speak)
  are kept for 60s, which can be changed with udp_timeout in the
  configuration.

- Added probes for UDP protocols QUICK and Teamspeak.

- Added probes for syslog protocol.

- sslh-select refactored to change linear searches through connections
  to linear searches through fd_set.

- Fixed a libconfig call to support libconfig 1.7.3.

- Added symbol to support libconfig 1.4.9, still in use in CentOS7.

- Warn about unknown settings in the configuration file.

- Added per-protocol transparent option. sslh-fork drops the capability after
  creating the server-side transparent socket. Transparent now uses CAP_NET_RAW
  instead of CAP_NET_ADMIN.

- Removed compile-time option to use POSIX regex. Now regex must be
  PCRE2 (Perl-Compatible). This was in fact the case since v1.21, as
  PCRE are used to parse the config file.