[RLVa] @camunlock

Causes LLAgentCamera::unlockView() to not happen, this turns off camera orbits.
Enables sim camera constraints regardless of user preference.
Resets camera when turned on.

indra/newview/rlvui.h

@@ -54,6 +54,7 @@ protected:
 	void onToggleShowNames(bool fQuitting);								// shownames
 	void onToggleShowNameTags(bool fQuitting);							// shownametags
 	void onToggleShowWorldMap();										// showworldmap
+	void onToggleCamUnlock();										// camunlock
 	void onToggleTp();													// tploc and tplm
 	void onToggleUnsit();												// unsit
 	void onToggleViewXXX();												// viewnote, viewscript, viewtexture