* Revert "Fix compilation on MacOS"
in order to another solution
* src: use IPPROTO_TCP in place of SOL_TCP
* use the more specific IPPROTO_TCP type for setsockopt
* fixes build on MacOS
src/edge_utils.c:891:31: error: use of undeclared identifier 'SOL_TCP'; did you mean 'FPP_TCP'?
setsockopt(eee->sock, SOL_TCP, TCP_NODELAY, &value, sizeof(value));
src/edge_utils.c:894:31: error: use of undeclared identifier 'SOL_TCP'
setsockopt(eee->sock, SOL_TCP, TCP_CORK, &value, sizeof(value));
^
src/edge_utils.c:894:40: error: use of undeclared identifier 'TCP_CORK'
setsockopt(eee->sock, SOL_TCP, TCP_CORK, &value, sizeof(value));
* include/n2n.h: drop redefiniton of SOL_TCP for WIN32, as we don't use it anywhere now
* src: only use TCP_CORK on LINUX
* it's LINUX only and fails on Win32 and MacOS (man 7 tcp)