Changes to the request feature in nxTools

[thunk]

My requests for the next version:

1. Option to discard the creation of [REQ] and [FILLED] dirs in the request directory
2. Option to set the maximum size of the request list (default 50)
3. Option or ability to re-order the list ID's on fill or delete just like in glftpd scripts
4. If maximum size is set, cycle through the reqlist (if it is full, max is 50, when new req is made, first is deleted)