Finished base management for volumetric features. Code compiles, but this feature is not tested so far!

Made CVARs for volumetric features module.
Made trigger delay attribute for volumes, per player. Count down for n seconds after when a player enter. When leaving a volume trigger delay is aborted.
Made parameter parsing functions; paramtools.inc.
Made functions for setting and parsing generic volume attributes.
Updated header in files to volumetric features and paramtools.inc.
Removed unused knockback functions in zadmin.inc.
Made certain class functions into stock functions.

src/zr/playerclasses/filtertools.inc

@@ -20,7 +20,7 @@
  *                  ZR_CLASS_CACHE_MODIFIED (modified class data).
  * @return          True if validation was successful, false otherwise.
  */
-bool:ClassValidateTeamRequirements(cachetype = ZR_CLASS_CACHE_ORIGINAL)
+stock bool:ClassValidateTeamRequirements(cachetype = ZR_CLASS_CACHE_ORIGINAL)
 {
     new zombieindex;
     new humanindex;
@@ -52,7 +52,7 @@ bool:ClassValidateTeamRequirements(cachetype = ZR_CLASS_CACHE_ORIGINAL)
  *                  ZR_CLASS_CACHE_MODIFIED (modified class data).
  * @return          True if validation was successful, false otherwise.
  */
-bool:ClassValidateTeamDefaults(cachetype = ZR_CLASS_CACHE_ORIGINAL)
+stock bool:ClassValidateTeamDefaults(cachetype = ZR_CLASS_CACHE_ORIGINAL)
 {
     new zombieindex;
     new humanindex;
@@ -85,7 +85,7 @@ bool:ClassValidateTeamDefaults(cachetype = ZR_CLASS_CACHE_ORIGINAL)
  * @param classindex    The index of the class to validate.
  * @return              A value with attribute error flags.
  */
-ClassValidateAttributes(classindex)
+stock ClassValidateAttributes(classindex)
 {
     // TODO: Validate immunity mode and amount.
     
@@ -257,7 +257,7 @@ ClassValidateAttributes(classindex)
  * @param classindex    The class index to validate.
  * @return              True if the class exist, false otherwise.
  */
-bool:ClassValidateIndex(classindex)
+stock bool:ClassValidateIndex(classindex)
 {
     if (classindex >= 0 && classindex < ClassCount)
     {
@@ -284,7 +284,7 @@ bool:ClassValidateIndex(classindex)
  *                  index will be used as a client index.
  * @return          True if equal, false otherwise.
  */
-bool:ClassTeamCompare(index, teamid, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock bool:ClassTeamCompare(index, teamid, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     switch (cachetype)
     {
@@ -324,7 +324,7 @@ bool:ClassTeamCompare(index, teamid, cachetype = ZR_CLASS_CACHE_MODIFIED)
  *                  data.
  * @return          The class index if successful, -1 otherwise.
  */
-ClassGetIndex(const String:name[], cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassGetIndex(const String:name[], cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     decl String:current_name[64];
 
@@ -356,7 +356,7 @@ ClassGetIndex(const String:name[], cachetype = ZR_CLASS_CACHE_MODIFIED)
  * @param client    The client index.
  * @return  The active class index. -1 on error or if a spectactor.
  */
-ClassGetActiveIndex(client)
+stock ClassGetActiveIndex(client)
 {
     new teamid = GetClientTeam(client);
     
@@ -405,7 +405,7 @@ ClassGetActiveIndex(client)
  * @return  True on success. False on error or if no classes were added or
  *          found.
  */
-bool:ClassAddToArray(Handle:array, teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock bool:ClassAddToArray(Handle:array, teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     // Validate the array.
     if (array == INVALID_HANDLE)
@@ -476,7 +476,7 @@ bool:ClassAddToArray(Handle:array, teamfilter = -1, bool:ignoreEnabled = false,
  *                          class data.
  * @return  Number of total classes or classes in the specified team.
  */
-ClassCountTeam(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassCountTeam(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     // Check if there are no classes.
     if (ClassCount == 0)
@@ -533,7 +533,7 @@ ClassCountTeam(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS
  *                      class data.
  * @return  The class index if successful, or -1 on error.
  */
-ClassGetRandomClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassGetRandomClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     new Handle:classarray;
     new arraycount;
@@ -574,7 +574,7 @@ ClassGetRandomClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_
  * @return  The first class index, or the first class index with the specified
  *          team ID. -1 on error.
  */
-ClassGetFirstClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassGetFirstClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     // Check if there are no classes.
     if (ClassCount == 0)
@@ -623,7 +623,7 @@ ClassGetFirstClass(teamfilter = -1, bool:ignoreEnabled = false, cachetype = ZR_C
  *                      class data.
  * @return  The first default class index. -1 on error.
  */
-ClassGetDefaultClass(teamid, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassGetDefaultClass(teamid, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     new Handle:classarray;
     new arraycount;
@@ -669,7 +669,7 @@ ClassGetDefaultClass(teamid, bool:ignoreEnabled = false, cachetype = ZR_CLASS_CA
  *          successful. -1 on critical errors. Otherwise it will try to fall
  *          back on the first class in the specified team.
  */
-ClassGetDefaultSpawnClass(teamid, cachetype = ZR_CLASS_CACHE_MODIFIED)
+stock ClassGetDefaultSpawnClass(teamid, cachetype = ZR_CLASS_CACHE_MODIFIED)
 {
     decl String:classname[64];
     new classindex;