Fix 'top 10' permission

When the access to 'top 10' is restricted, proper error message is
displayed.
Fix 'IRC' permission

When the access to 'IRC' is restricted, the proper error message is
displayed.
Fix 'Wiki' permission

When the access to 'Wiki' is restricted user/s can't view it and proper
error message is displayed.
Fix error message on request page

Fix error message on request page when user/s have not permission to
view it.
Fix 'PM' permission

When the access to 'PM' is restricted, user/s can't view it and proper
message is displayed.
Fix 'ip ban durring registration'

When your IP is banned from the tracker, you can't register. Note:
Before you just can't log in, but can register another account and use
it.
Add Checking if email is already used

Add Checking if email is already used when try to register. If email is
already in the DB, you will get error that this email is already used.
Change email validation code

Change email validation query.