Add `cl_anglekick`, when set to 0 angle kicks are ignored.

Angle kicks are used for weapon recoil, damage kicks and the like.
Setting the `cl_anglekicks` to `0` ignored them, they're read from
the network but not displayed. The cvar is cheat protected, it's
reset to `1` on server connect.

Rquested by Martin via mail.

doc/040_cvarlist.md

@@ -55,6 +55,9 @@ it's `+set busywait 0` (setting the `busywait` cvar) and `-portable`
   time for the next frame. The later is more CPU friendly but rather
   inaccurate, especially on Windows. Use with care.
 
+* **cl_anglekicks**: If set to `0` angle kicks (weapon recoil, damage
+  hits and the like) are ignored. Cheat protected. Defaults to `1`.
+
 * **cl_async**: If set to `1` (the default) the client is asynchronous.
   The client framerate is fixed, the renderer framerate is variable.
   This makes it possible to renderer as many frames as desired without

src/client/cl_entities.c

@@ -757,11 +757,14 @@ CL_CalcViewValues(void)
 		}
 	}
 
+	if (cl_anglekicks->value)
+	{
 		for (i = 0; i < 3; i++)
 		{
 			cl.refdef.viewangles[i] += LerpAngle(ops->kick_angles[i],
 					ps->kick_angles[i], lerp);
 		}
+	}
 
 	AngleVectors(cl.refdef.viewangles, cl.v_forward, cl.v_right, cl.v_up);
 

src/client/cl_main.c

@@ -48,6 +48,7 @@ cvar_t *cl_add_particles;
 cvar_t *cl_add_lights;
 cvar_t *cl_add_entities;
 cvar_t *cl_add_blend;
+cvar_t *cl_anglekicks;
 
 cvar_t *cl_shownet;
 cvar_t *cl_showmiss;
@@ -492,6 +493,7 @@ CL_InitLocal(void)
 	cl_add_lights = Cvar_Get("cl_lights", "1", 0);
 	cl_add_particles = Cvar_Get("cl_particles", "1", 0);
 	cl_add_entities = Cvar_Get("cl_entities", "1", 0);
+	cl_anglekicks = Cvar_Get("cl_anglekicks", "1", 0);
 	cl_gun = Cvar_Get("cl_gun", "2", CVAR_ARCHIVE);
 	cl_footsteps = Cvar_Get("cl_footsteps", "1", 0);
 	cl_noskins = Cvar_Get("cl_noskins", "0", 0);
@@ -659,6 +661,7 @@ cheatvar_t cheatvars[] = {
 	{"sw_draworder", "0"},
 	{"gl_lightmap", "0"},
 	{"gl_saturatelighting", "0"},
+	{"cl_anglekicks", "1"},
 	{NULL, NULL}
 };
 

src/client/header/client.h

@@ -308,6 +308,7 @@ extern	cvar_t	*cl_vwep;
 extern	cvar_t  *horplus;
 extern	cvar_t	*cin_force43;
 extern	cvar_t	*vid_fullscreen;
+extern	cvar_t	*cl_anglekicks;
 
 typedef struct
 {