Client/Server: Add server controllable fogparms using serverinfo

src/client/entry.qc

@@ -162,6 +162,7 @@ CSQC_UpdateView(float w, float h, float focus)
 	video_res[0] = w;
 	video_res[1] = h;
 
+	Fog_Update();
 	Sky_Update();
 	cvar_set("_background", serverkey("background"));
 

src/client/fog.qc

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2016-2020 Marco Hladik <marco@icculus.org>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
+ * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
+ * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
+
+var string g_strFogParms;
+
+void
+Fog_Update(void)
+{
+	if (g_strFogParms != serverkey("fogparms")) {
+		g_strFogParms = serverkey("fogparms");
+		localcmd(sprintf("fog %s\n", g_strFogParms));
+	}
+}

src/client/include.src

@@ -1,4 +1,5 @@
 #includelist
+fog.qc
 sky.qc
 music.qc
 sound.qc