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.

config_get_lines is now split into two functions:
 - config_get_lines which is the same as before we had %include
 - config_get_lines_include which actually processes %include