[SR-Dev] Patch: utils module compile fixes

Hi, attached patch fixes the msg_send usage for the utils module. It uses the forward_request function, instead of doing it manually with msg_send. Its against the kamailio-3.0 repository. I also attached a patch that implements a mk_proxy in shared memory and the necessary utility functions. The kamailio implementation used to allocates fewer parts of the struct. I simply did a replace for /pkg_/shm_/ on the existing proxy implementation, so suggestions for improvements are welcome. This patch is against the sr core, but perhaps its more appropriate to place it in the libkcore library. Please apply, thanks, Henning