Allows using `FCVAR_HIDDEN` to block commands from appearing in `sm_help` and `sm_searchcmd` which helps with creating alias to commands without filling up the list with those aliases.
For example:
```sourcepawn
RegAdminCmd("sm_setmyperk", MyCommand, ADMFLAG_CHEATS);
RegAdminCmd("sm_setmyperks", MyCommand, ADMFLAG_CHEATS, _, FCVAR_HIDDEN);
RegConsoleCmd("ff2_boss", MyCommand);
RegConsoleCmd("ff2boss", MyCommand, _, FCVAR_HIDDEN);
```
Batfoxkid