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bz_setBZDBString
bool bz_setBZDBString (const char* variable, const char* val, int perms = 0, bool persistent = false)
Sets a BZDB variable to a given string value.
Parameters: 
variable  -  Variable name (E.g. "_shockOutRadius") 
val  -  The value to set the variable to. 
perms = 0  -  What to set the permission value to. (Range: 1-3. Using 0 sets it to the default [2], and using a higher number sets it to 3.) 
persistent = false  -  Whether or not the variable will be persistent. 
Returns: 
Whether or not the set was successful.
Example
Sets the fog color to a light white color.
bz_setBZDBString("_fogColor","0.8 0.8 0.8");