krfb: drop SLP support

TODO from https://github.com/fluxer/katana/issues/8

Signed-off-by: Ivailo Monev <xakepa10@laimg.moc>

krfb/TODO

@@ -1,7 +1,5 @@
 
 For 3.2:
-- write SLP service template for remote desktop protocols
-  (documentation)
 - enhance RFB with SASL authentication (Kerberos)
 - encrypted connections (using SASL and/or SSL/TLS)
 - with kerberos/ssl: display name of remote user in connection dialog,
@@ -11,11 +9,9 @@ For 3.2:
 Todo (unscheduled features):
 - when krfb is started with URL arguments and without connection
   quality, add some kind of smart algorithm to determine whether the
-  other host is local (maybe using SLP to announce the connectivity 
-  of a LAN)
+  other host is local
 - NAT traversal support if I can find an acceptable implementation
   (probably using TURN, as soon as there is a server and newer spec for that)
-- when OpenSLP supports this, allow scope configuration
 - split krfb into 2 separate programs (server and invitation)
 - look into adding an extension to xfree to improve speed (get noticed of
   screen updates)

krfb/krfb/config-krfb.h.cmake

@@ -1,9 +1,6 @@
 /* Define to 1 if you have the `getifaddrs' function. */
 #cmakedefine HAVE_GETIFADDRS 1
 
-/* Define if SLP is available */
-#cmakedefine HAVE_SLP 1
-
 /* Define if XDamage is available */
 #cmakedefine HAVE_XDAMAGE 1