1. add missing locks in search requests into fimonitor.cc.
2. The ability for browseable-only files to be searched by hash from turtle router has been suppressed.
3. Some... deadly code in rsdiscitems.cc that was causing crashes has been cleaned up.
4. The security of size determination for file lists, which caused a chain reaction ending in a client crash, has been improved.
5. A missing lock in ftcontroller has been added