URL address from application to NUA
For normal nua calls, this tag is used as request target, which is usually stored as request-URI.
It is used to set stack's own address with nua_create(), nua_set_params() and nua_get_params(). It can be specified multiple times when used with nua_create().
Corresponding tag taking reference parameter is NUTAG_URL_REF()
Definition at line 75 of file nua_tag.h.