Relookup reputation and geo information when client IP changes due to WEBIRC

or another type of proxy request.
This fixes a problem where ban user { } or except ban { } is not working
for ~country:XX when the request comes via a WEBIRC or other proxy.
Reported by CaoS in https://bugs.unrealircd.org/view.php?id=6058
It should also fix security-group being incorrect for ~security-group bans
or exempts.

src/modules/geoip_base.c

@@ -25,6 +25,7 @@ void geoip_base_free(ModData *m);
 const char *geoip_base_serialize(ModData *m);
 void geoip_base_unserialize(const char *str, ModData *m);
 int geoip_base_handshake(Client *client);
+int geoip_base_ip_change(Client *client, const char *oldip);
 int geoip_base_whois(Client *client, Client *target, NameValuePrioList **list);
 int geoip_connect_extinfo(Client *client, NameValuePrioList **list);
 int geoip_base_configtest(ConfigFile *cf, ConfigEntry *ce, int type, int *errs);
@@ -119,6 +120,7 @@ MOD_INIT()
 
 	HookAdd(modinfo->handle, HOOKTYPE_CONFIGRUN, 0, geoip_base_configrun);
 	HookAdd(modinfo->handle, HOOKTYPE_HANDSHAKE, 0, geoip_base_handshake);
+	HookAdd(modinfo->handle, HOOKTYPE_IP_CHANGE, 0, geoip_base_ip_change);
 	HookAdd(modinfo->handle, HOOKTYPE_SERVER_HANDSHAKE_OUT, 0, geoip_base_handshake);
 	HookAdd(modinfo->handle, HOOKTYPE_CONNECT_EXTINFO, 1, geoip_connect_extinfo); /* (prio: near-first) */
 	HookAdd(modinfo->handle, HOOKTYPE_PRE_LOCAL_CONNECT, 0,geoip_base_handshake); /* in case the IP changed in registration phase (WEBIRC, HTTP Forwarded) */
@@ -166,6 +168,12 @@ int geoip_base_handshake(Client *client)
 	return 0;
 }
 
+int geoip_base_ip_change(Client *client, const char *oldip)
+{
+	geoip_base_handshake(client);
+	return 0;
+}
+
 void geoip_base_free(ModData *m)
 {
 	if (m->ptr)

src/modules/reputation.c

@@ -141,6 +141,7 @@ CMD_FUNC(reputationunperm);
 int reputation_whois(Client *client, Client *target, NameValuePrioList **list);
 int reputation_set_on_connect(Client *client);
 int reputation_pre_lconnect(Client *client);
+int reputation_ip_change(Client *client, const char *oldip);
 int reputation_connect_extinfo(Client *client, NameValuePrioList **list);
 int reputation_config_test(ConfigFile *cf, ConfigEntry *ce, int type, int *errs);
 int reputation_config_run(ConfigFile *cf, ConfigEntry *ce, int type);
@@ -192,6 +193,7 @@ MOD_INIT()
 	HookAdd(modinfo->handle, HOOKTYPE_CONFIGRUN, 0, reputation_config_run);
 	HookAdd(modinfo->handle, HOOKTYPE_WHOIS, 0, reputation_whois);
 	HookAdd(modinfo->handle, HOOKTYPE_HANDSHAKE, 0, reputation_set_on_connect);
+	HookAdd(modinfo->handle, HOOKTYPE_IP_CHANGE, 0, reputation_ip_change);
 	HookAdd(modinfo->handle, HOOKTYPE_PRE_LOCAL_CONNECT, 2000000000, reputation_pre_lconnect); /* (prio: last) */
 	HookAdd(modinfo->handle, HOOKTYPE_REMOTE_CONNECT, -1000000000, reputation_set_on_connect); /* (prio: near-first) */
 	HookAdd(modinfo->handle, HOOKTYPE_CONNECT_EXTINFO, 0, reputation_connect_extinfo); /* (prio: near-first) */
@@ -804,6 +806,12 @@ int reputation_set_on_connect(Client *client)
 	return 0;
 }
 
+int reputation_ip_change(Client *client, const char *oldip)
+{
+	reputation_lookup_score_and_set(client);
+	return 0;
+}
+
 int reputation_pre_lconnect(Client *client)
 {
 	/* User will likely be accepted. Inform other servers about the score