[Description] A domain to use in rewritten addresses. If not set, SRS is disabled. [Example] srs.foo-bar.com [Parameter] 
srs_domain
s r s _ d o m a i n
s r s _ s e c r e t s
s r s _ m a x a g e
s r s _ h a s h l e n g t h
s r s _ h a s h m i n
s r s _ s e p a r a t o r
s r s _ a l w a y s r e w r i t e