Log Message:
Changes 1.9.20141209:
fix upnp_add_inboundpinhole() : check inet_pton() return
fix upnp_redirect() : check inet_aton() return
fix potential memory corruption in upnpsoap.c/GetListOfPortMappings()
fix buffer overrun in ParseHttpHeaders() if Content-Length doesn't contain any \ 
digit !
check if BuildHeader_upnphttp() failed to allocate memory