Clearview IPMP manpages

@@ -23,18 +23,21 @@
      options  associated with a socket. Options may exist at mul-
      tiple protocol levels; they are always present at the upper-
      most "socket" level.
 
 
-     When manipulating socket options, the  level  at  which  the
-     option resides and the name of the option must be specified.
-     To manipulate options at the "socket" level, level is speci-
-     fied  as  SOL_SOCKET.  To  manipulate  options  at any other
-     level, level is the protocol number  of  the  protocol  that
-     controls the option. For example, to indicate that an option
-     is to be interpreted by the TCP protocol, level  is  set  to
-     the TCP protocol number. See getprotobyname(3SOCKET).
+     The *level* argument  specifies the protocol level  at which
+     the option resides.    To manipulate options  at the  socket
+     level,  specify the *level*   argument as  *SOL_SOCKET*.  To
+     manipulate  options  at the    protocol level,   supply  the
+     appropriate protocol number for the protocol controlling the
+     option.  For example, to  indicate  that an option  will  be
+     interpreted  by TCP, set *level*  to the  protocol number of
+     TCP,  as defined   in the  *<netinet/in.h>*  header,  or  as
+     determined by  using *getprotobyname(3SOCKET)*.  Some socket
+     protocol families may also define additional levels, such as
+     *SOL_ROUTE*.  Only socket-level options are described here.
 
 
      The parameters optval and optlen are used to  access  option
      values  for  setsockopt(). For getsockopt(), they identify a
      buffer in which the value(s) for the requested option(s) are