Initiates a connection on a socket.
    The $QIO equivalent is the IO$_ACCESS system service.
    Format
      #include  <types.h>
      #include  <socket.h>
      int connect  ( int s, struct sockaddr *name, int namelen );
                   (_DECC_V4_SOURCE)
      int connect  ( int s, const struct sockaddr *name, size_t
                   namelen ); (not_DECC_V4_SOURCE)