Fixed Content-Type header sent in xcap_pres_rules script

Ignore-this: 9c1bf0e7ba0b679ea569027304b0f38a

darcs-hash:20090817080201-1e3d8-27f2b1183aaad2f3e3bcdfaae7fc02605efc0837
Fixed Content-Type header sent in xcap_rls_services script

Ignore-this: f9a8de3e66043a192c483bf0f8488417

darcs-hash:20090817080353-1e3d8-02617e562a44c2924f457fabcb6bdcb690b7fafc