Changes in 7.16

If output file is missing on startup, flag task as error.
Let project specify directories in logical file names.
Fix security vulnerability involving logical file names.
Make "reread config files" work for ncpus.
Support fetch of files over GUI RPC; allow projects to supply their own web-based GUI.
FreeBSD: check for AVX
Support GUI RPCs as HTTP Post requests.
Register user consent to terms of use.
Enable "Other options" in simple view if no client connected.
Clear "vm_extensions_disabled" flag on startup.
Fix work fetch bug when max_concurrent used.
Unsuspend jobs before telling them to quit.
Sanity-check job runtime limits.
Fix overflow in OpenCL GPU FLOPS calculation.
Windows: show processor group info at startup
Fix stall if --skip_cpu_benchmarks
Fix crash in RSS feed fetch
Windows: fix GUI RPC password generation when running in a VM
Windows: make --dir work

Release Notes for BOINC 7.16