Made sockets interface POSIX compliant, and optional depending on precompiler flags

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14033 bac0169d-1eea-4375-b5f6-f89d2ced9994
Made sockets interface POSIX compliant, and optional depending on precompiler flags

git-svn-id: svn://svn.code.sf.net/p/cp2k/code/trunk@14034 bac0169d-1eea-4375-b5f6-f89d2ced9994