Use AC_SEARCH_LIBS on socket() for -lsocket, so we don't link with

-lsocket unless it is necessary.
Remove SHLIB_LDFLAGS, it was never used by anything.

configure.in

@@ -22,16 +22,13 @@ case "$host" in
     ;;
 esac
 
-AC_CHECK_LIB(socket, socket, [
-SHLIB_LDFLAGS="$SHLIB_LDFLAGS -lsocket"
-LIBS="$LIBS -lsocket"
-])
+# Some systems (Solaris?) have socket() in -lsocket.
+AC_SEARCH_LIBS(socket, socket)
 
-# Solaris has inet_addr in -lnsl.
+# Solaris has inet_addr() in -lnsl.
 AC_SEARCH_LIBS(inet_addr, nsl)
 
 AC_SUBST(SHLIB_SUFFIX_NAME)
-AC_SUBST(SHLIB_LDFLAGS)
 AC_SUBST(LIBS)
 
 AC_PROG_CC