* net.cc (cygwin_inet_ntoa): Rearrange previous patch to use

    * net.cc (cygwin_inet_ntoa): Rearrange previous patch to use
        thread local buffer space when compiled thread safe.
        (cygwin_getprotobyname): Ditto.
        (cygwin_getprotobynumber): Ditto.
        (cygwin_getservbyname): Ditto.
        (cygwin_getservbyport): Ditto.
        (cygwin_gethostbyname): Ditto.
        (cygwin_gethostbyaddr): Ditto. Move near to cygwin_gethostbyname.
        * thread.h (struct _winsup_t): Add pointers for above used buffer space.
        * passwd.cc (getpwduid): Remove initializing passwd.
        (setpwent): Ditto.
        (endpwent): Ditto.
        (setpassent): Ditto.