etc/kamailio.cfg: use of htable guarded by own ifdef

- allows independent loading for extending (e.g., store items to fix
  in-dialog routing)

etc/kamailio.cfg

@@ -93,6 +93,9 @@
 #       block if more than 16 requests in 2 seconds and ban for 300 seconds)
 #     - define WITH_ANTIFLOOD
 #
+# *** To load htable module execute:
+#     - define WITH_HTABLE
+#
 # *** To block 3XX redirect replies execute:
 #     - define WITH_BLOCK3XX
 #
@@ -148,6 +151,11 @@ import_file "kamailio-local.cfg"
 #!define MULTIDOMAIN 0
 #!endif
 
+#!ifdef WITH_ANTIFLOOD
+# - hash table 'ipban' used to store blocked IP addresses
+#!trydef WITH_HTABLE
+#!endif
+
 # - flags
 #   FLT_ - per transaction (message) flags
 #!define FLT_ACC 1
@@ -315,8 +323,11 @@ loadmodule "rtpproxy.so"
 loadmodule "tls.so"
 #!endif
 
-#!ifdef WITH_ANTIFLOOD
+#!ifdef WITH_HTABLE
 loadmodule "htable.so"
+#!endif
+
+#!ifdef WITH_ANTIFLOOD
 loadmodule "pike.so"
 #!endif
 
@@ -482,11 +493,15 @@ modparam("tls", "config", "/usr/local/etc/kamailio/tls.cfg")
 modparam("pike", "sampling_time_unit", 2)
 modparam("pike", "reqs_density_per_unit", 16)
 modparam("pike", "remove_latency", 4)
+#!endif
 
+#!ifdef WITH_HTABLE
 # ----- htable params -----
+#!ifdef WITH_ANTIFLOOD
 /* ip ban htable with autoexpire after 5 minutes */
 modparam("htable", "htable", "ipban=>size=8;autoexpire=300;")
 #!endif
+#!endif
 
 #!ifdef WITH_DEBUG
 # ----- debugger params -----