Hi,
Seems like two ims module links (linked from http://kamailio.org/docs/modules/4.1.x/) are broken:
http://kamailio.org/docs/modules/4.1.x/modules/ims_registrar_pcscf.html http://kamailio.org/docs/modules/4.1.x/modules/ims_usrloc_scscf.html
The same for http://kamailio.org/docs/modules/devel/, as far as I can see.
Thanks for checking!
Andreas