Also, stop implying that Roger still does all the source releases.

This bug had existed since 0.2.4.7-alpha, but now that we have
FallbackDirs by default, it actually matters.

Fixes bug 19947; bugfix on 0.2.4.7-alpha or maybe 0.2.8.1-alpha.

Rubiate wrote the patch; teor wrote the changes file.

Fixes bug 19903; bugfix on 0.2.8.1-alpha.

Existing Uses of the tor_free function on voting schedules were
replaced with voting_schedule_free.
Fixes #19562.

Closes 19743.

This bug was introduced in 8bbbbaf8 when we added a separate
or_options_free() function but didn't start using it everywhere.

Fixes bug 19466.

This is an implementation-defined-behavior issue, not an
undefined-behavior issue.

OpenBSD removes this function, and now that Tor requires Libevent 2,
we should also support the OpenBSD Libevent 2.

Fixes bug 19904; bugfix on 0.2.5.4-alpha.

Fixes bug 19901; bugfix on 0.2.9.1-alpha.

Also, collapse all the config_assign*() options into a flags
argument, since having two boolean arguments was already confusing.

In particular, teach it that deprecated options must exist.