Except for src/ext, which we may not want to modify.

Closes ticket 32732.

For scripts that work with python2, use /usr/bin/python.
Otherwise, use /usr/bin/env python3.

Fixes bug 29913; bugfix on 0.2.5.3-alpha.

We changed the default of ExitRelay in #21530 in 0.3.5.1-alpha, but
forgot to update the documentation.

Closes 29612.

Includes a sentence from cypherpunks; for ticket 24526.

Includes a sentence from cypherpunks; for ticket 24526.

Part of 22145

Sample config-only change.

Implements 24703.