move notes from the fabric_tpa readme here

There are no formal releases of the code for now.

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Those are the main jobs being automated by fabric:

 * [automate installs][]

 * [automate reboots][]

 * [automate retirement][]

[automate installs]: https://trac.torproject.org/projects/tor/ticket/31239

[automate reboots]: https://trac.torproject.org/projects/tor/ticket/33406

[automate retirement]: https://trac.torproject.org/projects/tor/ticket/33477

## Issues

were positive. A few weeks later, a library of functions was available

and the migration procedure was almost entirely automated.

## LDAP notes

LDAP integration might be something we could consider, because it's a

large part of the automation that's required in a lot of our work. One

alternative is to talk with `ldapvi` or commandline tools, the other

is to implement some things natively in Python:

 * [Python LDAP][] could be used to automate talking with ud-ldap,

   see in particular the [Python LDAP functions][], in particular

   [add][] and [delete][]

 * The above docs are very limited, and they [suggest][] external

   resources also:

   * https://hub.packtpub.com/python-ldap-applications-extra-ldap-operations-and-ldap-url-library/

   * https://hub.packtpub.com/configuring-and-securing-python-ldap-applications-part-2/

   * https://www.linuxjournal.com/article/6988

[Python LDAP]: https://www.python-ldap.org/

[Python LDAP functions]: https://www.python-ldap.org/en/python-ldap-3.2.0/reference/ldap.html#functions

[delete]: https://www.python-ldap.org/en/python-ldap-3.2.0/reference/ldap.html#ldap.LDAPObject.delete

[add]: https://www.python-ldap.org/en/python-ldap-3.2.0/reference/ldap.html#ldap.LDAPObject.add

[suggest]: https://www.python-ldap.org/en/python-ldap-3.2.0/resources.html

## Goals

### Must have