Tor complains that it can't find a ClientTransportPlugin line, when managed proxy dies.
In legacy/trac#5070, arma says that when he sets his torrc to:
```
ClientTransportPlugin obfs2 exec /path/to/nonexistent/file --managed
```
he gets this in his logs:
```
Feb 10 03:23:28.000 [warn] Could not launch managed proxy executable!
Feb 10 03:23:28.000 [warn] You have a Bridge line using the obfs2 pluggable transport, but there doesn't seem to be a corresponding ClientTransportPlugin line.
```
which is not true.
issue