Alex Kavanagh 9c12812735 Switch the charm to support py3
Some major changes:
* the charm has been rebased (from a Python perspective) to be rooted in
  the charm directory.  This is a single root.
* Imports have been changed so that the don't add lots of imports to the
  namespace of the module doing the import.
* The code that used to run at module import time has been made lazy
  such that it only has to run if the relevant functions are called.
  This includes restart_on_change parameters, the harden function and
  the parameters to the guard_map.  Appropriate changes will be
  submitted to charm-helpers.
* Several tests had to be re-written as (incorrect) mocking meant that
  text fixtures didn't actually match what the code was doing.  Thus,
  the tests were meaningless.
* This has had a net positive impact on the unit tests wrt to importing
  modules and mocking.

Change-Id: Id07d9d1caaa9b29453a63c2e49ba831071e9457f
2018-10-18 15:43:03 +01:00

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# NOTE: this schema must contain all valid keys from it's associated defaults
# file. It is used to validate user-provided overrides.
common:
service_name:
network_ipv6_enable:
ports:
remote_hosts:
client:
package:
cbc_required:
weak_hmac:
weak_kex:
roaming:
password_authentication:
server:
host_key_files:
cbc_required:
weak_hmac:
weak_kex:
allow_root_with_key:
allow_tcp_forwarding:
allow_agent_forwarding:
allow_x11_forwarding:
use_privilege_separation:
listen_to:
use_pam:
package:
password_authentication:
alive_interval:
alive_count:
sftp_enable:
sftp_group:
sftp_chroot:
deny_users:
allow_users:
deny_groups:
allow_groups:
print_motd:
print_last_log:
use_dns:
max_auth_tries:
max_sessions: