Documentation updates for accelerate mode improvements

CHANGELOG.md

@@ -8,6 +8,9 @@ Major features/changes:
 * The deprecated legacy variable templating system has been finally removed.  Use {{ foo }} always not $foo or ${foo}.
 * Any data file can also be JSON.  Use sparingly -- with great power comes great responsibility.  Starting file with "{" or "[" denotes JSON.
 * Added 'gathering' param for ansible.cfg to change the default gather_facts policy.
+* Accelerate improvements:
+  - multiple users can connect with different keys, when `accelerate_multi_key = yes` is specified in the ansible.cfg.
+  - daemon lifetime is now based on the time from the last activity, not the time from the daemon's launch.
 
 New Modules:
 

docsite/rst/playbooks_acceleration.rst

@@ -76,4 +76,11 @@ As noted above, accelerated mode also supports running tasks via sudo, however t
 * You must remove requiretty from your sudoers options.
 * Prompting for the sudo password is not yet supported, so the NOPASSWD option is required for sudo'ed commands.
 
+As of Ansible version `1.6`, you can also allow the use of multiple keys for connections from multiple Ansible management nodes. To do so, add the following option
+to your `ansible.cfg` configuration::
+
+    accelerate_multi_key = yes
+
+When enabled, the daemon will open a UNIX socket file (by default `$ANSIBLE_REMOTE_TEMP/.ansible-accelerate/.local.socket`). New connections over SSH can
+use this socket file to upload new keys to the daemon.