High: ipc_socket: Signalhandler must be resetted to Default, use only cleanup_sigpipe to return from qb_ipc_dgram_sock_setup.

Some OS like Solaris/Illumos return with ECONNRESET or EPIPE in the case of a disconnecting peer.
Change the return code to ENOTCONN and continue.
Merge pull request #131 from davidvossel/reformatting

High: ipc_socket: Signalhandler must be resetted to Default, use only cl...