* New process-control RPC feature in clixon-lib.yang to manage processes

* This is an alternative to manage a clixon daemon via sudtemd, containerd or other
  * One important special case is starting the clixon-restconf daemon internally
  * This is how it works:
    * Register a process via `clixon_process_register(h, name, namespace, argv, argc)`
    * Use process-control RPC defined in clixon-lib.yang to start/stop/restart or query status on that process
  * Example code in the main example

doc/DEVELOP.md

@@ -38,7 +38,7 @@ However, releases are made periodically (ca every 1 month) which is more tested.
 
 A release branch can be made, eg release-4.0 where 4.0.0, 4.0.1 are tagged
 
-## How the meta-configure stuff works
+## How the autotools stuff works
 ```
 configure.ac --.
                     |   .------> autoconf* -----> configure

doc/FAQ.md

@@ -1,5 +1,7 @@
 # Clixon FAQ
 
+This FAQ may be outdated. Main [Clixon documentation](clixon-docs.readthedocs.io/) contains more detailed information.
+
   * [What is Clixon?](#what-is-clixon)
   * [Why should I use Clixon?](#why-should-i-use-clixon)
   * [What license is available?](#what-license-is-available)

doc/ROADMAP.md

@@ -1,11 +0,0 @@
-# Clixon roadmap
-
-- Support for restconf call-home (RFC 8071)
-- NETCONF
-  - Support for additional Netconf [edit-config modes](https://github.com/clicon/clixon/issues/53)
-  - Netconf [framing](https://github.com/clicon/clixon/issues/50)
-  - [Child ordering](https://github.com/clicon/clixon/issues/22)
-- [gRPC](https://github.com/clicon/clixon/issues/43)
-
-
-