* Pushed tag to 4.0.1.PRE

* Restconf RFC 8040 increased feature compliance
  * Cache-Control: no-cache added in HTTP responses (RFC Section 5.5)
  * Restconf monitoring capabilities (RFC Section 9.1)
* Added support for Yang extensions
  * New plugin callback: ca_extension
  * Main backend example includes example code on how to implement a Yang extension in a plugin.
* JSON changes
  * Non-pretty-print output removed all extra spaces.
    * Example: `{"nacm-example:x": 42}` --> {"nacm-example:x":42}`
  * Empty JSON container changed from `null` to `{}`.
    * Empty list and leafs remain as `null`
* Removed unnecessary configure dependencies
  * libnsl, libcrypt, libm, if_vlan,...
* pseudo-plugin added, to enable callbacks also for main programs. Useful for extensions
* Yang Unique statements with multiple schema identifiers did not work on some platforms due to memory error.

test/test_nacm.sh

@@ -132,7 +132,7 @@ wait_backend
 wait_restconf
 
 new "auth get"
-expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors" : {"error": {"rpc-error": {"error-type": "application","error-tag": "invalid-value","error-severity": "error","error-message": "Instance does not exist"}}}}
'
+expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"rpc-error":{"error-type":"application","error-tag":"invalid-value","error-severity":"error","error-message":"Instance does not exist"}}}}
'
 
 # explicitly disable nacm (regression on netgate bug)
 new "disable nacm"
@@ -145,13 +145,13 @@ new "commit it"
 expecteof "$clixon_netconf -qf $cfg" 0 "<rpc><commit/></rpc>]]>]]>" "^<rpc-reply><ok/></rpc-reply>]]>]]>$"
 
 new "auth get (no user: access denied)"
-expecteq "$(curl -sS -X GET -H \"Accept:\ application/yang-data+json\" http://localhost/restconf/data)" 0 '{"ietf-restconf:errors" : {"error": {"error-type": "protocol","error-tag": "access-denied","error-severity": "error","error-message": "The requested URL was unauthorized"}}}
'
+expecteq "$(curl -sS -X GET -H \"Accept:\ application/yang-data+json\" http://localhost/restconf/data)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"protocol","error-tag":"access-denied","error-severity":"error","error-message":"The requested URL was unauthorized"}}}
'
 
 new "auth get (wrong passwd: access denied)"
-expecteq "$(curl -u andy:foo -sS -X GET http://localhost/restconf/data)" 0 '{"ietf-restconf:errors" : {"error": {"error-type": "protocol","error-tag": "access-denied","error-severity": "error","error-message": "The requested URL was unauthorized"}}}
'
+expecteq "$(curl -u andy:foo -sS -X GET http://localhost/restconf/data)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"protocol","error-tag":"access-denied","error-severity":"error","error-message":"The requested URL was unauthorized"}}}
'
 
 new "auth get (access)"
-expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x": 0}
+expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x":0}
 
'
 
 #----------------Enable NACM
@@ -160,24 +160,24 @@ new "enable nacm"
 expecteq "$(curl -u andy:bar -sS -X PUT -d '{"ietf-netconf-acm:enable-nacm": true}' http://localhost/restconf/data/ietf-netconf-acm:nacm/enable-nacm)" 0 ""
 
 new "admin get nacm"
-expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x": 0}
+expecteq "$(curl -u andy:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x":0}
 
'
 
 new "limited get nacm"
-expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x": 0}
+expecteq "$(curl -u wilma:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"nacm-example:x":0}
 
'
 
 new "guest get nacm"
-expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors" : {"error": {"error-type": "application","error-tag": "access-denied","error-severity": "error","error-message": "access denied"}}}
'
+expecteq "$(curl -u guest:bar -sS -X GET http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"access denied"}}}
'
 
 new "admin edit nacm"
-expecteq "$(curl -u andy:bar -sS -X PUT -d '{"nacm-example:x": 1}' http://localhost/restconf/data/nacm-example:x)" 0 ""
+expecteq "$(curl -u andy:bar -sS -X PUT -d '{"nacm-example:x":1}' http://localhost/restconf/data/nacm-example:x)" 0 ""
 
 new "limited edit nacm"
-expecteq "$(curl -u wilma:bar -sS -X PUT -d '{"nacm-example:x": 2}' http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors" : {"error": {"error-type": "application","error-tag": "access-denied","error-severity": "error","error-message": "default deny"}}}
'
+expecteq "$(curl -u wilma:bar -sS -X PUT -d '{"nacm-example:x": 2}' http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"default deny"}}}
'
 
 new "guest edit nacm"
-expecteq "$(curl -u guest:bar -sS -X PUT -d '{"nacm-example:x": 3}' http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors" : {"error": {"error-type": "application","error-tag": "access-denied","error-severity": "error","error-message": "access denied"}}}
'
+expecteq "$(curl -u guest:bar -sS -X PUT -d '{"nacm-example:x": 3}' http://localhost/restconf/data/nacm-example:x)" 0 '{"ietf-restconf:errors":{"error":{"error-type":"application","error-tag":"access-denied","error-severity":"error","error-message":"access denied"}}}
'
 
 new "Kill restconf daemon"
 stop_restconf