Merge ~raharper/cloud-init:fix-snap-user-doc into cloud-init:master

[Ryan Harper]

Add rtd entry for snap_config config module

Fix missing snap_config module documentation by adding it to
the modules list. Update the documentation title so it does
not collide with existing snappy title.

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diff --git a/cloudinit/config/cc_snap_config.py b/cloudinit/config/cc_snap_config.py
index db51166..fe0cc73 100644
--- a/cloudinit/config/cc_snap_config.py
+++ b/cloudinit/config/cc_snap_config.py
@@ -5,8 +5,8 @@
 # This file is part of cloud-init. See LICENSE file for license information.
 
 """
-Snappy
-------
+Snap Config
+-----------
 **Summary:** snap_config modules allows configuration of snapd.
 
 This module uses the same ``snappy`` namespace for configuration but
diff --git a/doc/rtd/topics/modules.rst b/doc/rtd/topics/modules.rst
index a3ead4f..c963c09 100644
--- a/doc/rtd/topics/modules.rst
+++ b/doc/rtd/topics/modules.rst
@@ -44,6 +44,7 @@ Modules
 .. automodule:: cloudinit.config.cc_set_hostname
 .. automodule:: cloudinit.config.cc_set_passwords
 .. automodule:: cloudinit.config.cc_snappy
+.. automodule:: cloudinit.config.cc_snap_config
 .. automodule:: cloudinit.config.cc_spacewalk
 .. automodule:: cloudinit.config.cc_ssh
 .. automodule:: cloudinit.config.cc_ssh_authkey_fingerprints