[torsocks] Detect elevated capability executables
Before:
$ torsocks ping torproject.org
PING torproject.org (154.35.132.70) 56(84) bytes of data.
64 bytes from archeotrichon.torproject.org (154.35.132.70): icmp_seq=1 ttl=52 time=235 ms
64 bytes from archeotrichon.torproject.org (154.35.132.70): icmp_seq=2 ttl=52 time=166 ms
64 bytes from archeotrichon.torproject.org (154.35.132.70): icmp_seq=3 ttl=52 time=155 ms
After:
$ torsocks /bin/ping
ERROR: /bin/ping gains the following elevated capabilities. torsocks will not work with privledged executables.
/bin/ping = cap_net_raw+ep
**Trac**:
**Username**: shawnl
issue