paramiko/proxy.py refers to an undefined exception name BadProxyCommand twice.
I checked with pyflakes to see if there might be any other similar problems, and found none:
mg@platonas: ~/src/paramiko [git:master=] $ pyflakes paramiko|grep -v 'imported but unused'|grep -v 'never used'|grep -v 'unable to detect'
paramiko/proxy.py:67: undefined name 'BadProxyCommand'
paramiko/proxy.py:83: undefined name 'BadProxyCommand'
I see it was renamed in 394ab26
Fix NameError in error-handling case
Merged this into the branch for #252, which is based off of 1.11 (FYI - not master, though as usual it will be merged up to master when done.) Thanks!
Changelog re #268