sclose() function-like macro definition used to close a socket,

now solely based on HAVE_CLOSESOCKET and HAVE_CLOSESOCKET_CAMEL
config file preprocessor definitions.

config.dos

@@ -154,6 +154,7 @@
   #define HAVE_AF_INET6                    1
   #define HAVE_ARPA_INET_H                 1
   #define HAVE_ARPA_NAMESER_H              1
+  #define HAVE_CLOSESOCKET_CAMEL           1
   #define HAVE_GETHOSTNAME                 1
   #define HAVE_NETDB_H                     1
   #define HAVE_NETINET_IN_H                1
@@ -167,6 +168,7 @@
   #define HAVE_SYS_UIO_H                   1
   #define NS_INADDRSZ                      4
   #define HAVE_STRUCT_SOCKADDR_IN6         1
+  #define CloseSocket(s)  close_s((s))
 #endif
 
 #undef word