TN5250 Service Registration Message
URL: service:tn5250://<addr-spec>:<port-number>
Attributes:
(SCOPE=<string>),
(PROTOCOL=<string>),
(RELEASE=<string>),
(PLATFORM=<string>),
(LOAD=<integer 0 to 100>),
(SECURITY=NONE),
(SECURITY=<security>),
(CIPHERSUITES=<Spec1,Spec2,...Specn>),
(FUNCTIONS=NONE),
(RFC1205),
(SERVERNAME=<string>),
(AS400NAME=<string>),