As part of Wildfly Elytron integration would be useful to allow to put custom SSLSocketFactory into SyslogHandler.

It would allow to use ssl-context defined in elytron (with custom configuration of CAs, truststore, keystore) for syslog over TLS.

(SyslogHandler is used for syslog audit logging in Elytron too - and currently no way to put elytron ssl-context into)