include all users messages if level was not requested in find command

src/lib/ebus/message.cpp

@@ -2002,8 +2002,8 @@ Message* MessageMap::find(const string& circuit, const string& name, const strin
 }
 
 deque<Message*> MessageMap::findAll(const string& circuit, const string& name, const string& levels,
-    const bool completeMatch, const bool withRead, const bool withWrite,
-    const bool withPassive, const bool onlyAvailable,
+    const bool completeMatch, const bool withRead, const bool withWrite, const bool withPassive,
+    const bool includeEmptyLevel, const bool onlyAvailable,
     const time_t since, const time_t until) {
   deque<Message*> ret;
   string lcircuit = circuit;
@@ -2019,7 +2019,7 @@ deque<Message*> MessageMap::findAll(const string& circuit, const string& name, c
     }
     for (vector<Message*>::iterator msgIt = it->second.begin(); msgIt != it->second.end(); msgIt++) {
       Message* message = *msgIt;
-      if (checkLevel && !message->hasLevel(levels, !completeMatch)) {
+      if (checkLevel && !message->hasLevel(levels, includeEmptyLevel)) {
         continue;
       }
       if (checkCircuit) {

src/lib/ebus/message.h

@@ -1320,6 +1320,8 @@ class MessageMap : public FileReader {
    * @param withWrite true to include write messages (default false).
    * @param withPassive true to include passive messages (default false).
    * @return the found @a Message instances.
+   * @param includeEmptyLevel true to also include messages with no access level, false to include only messages with
+   * the specified level.
    * @param onlyAvailable true to include only available messages (default true), false to also include messages that
    * are currently not available (e.g. due to unresolved or false conditions).
    * @param since the start time from which to add updates (inclusive, also removes messages with unset destination
@@ -1330,7 +1332,7 @@ class MessageMap : public FileReader {
    */
   deque<Message*> findAll(const string& circuit, const string& name, const string& levels,
     const bool completeMatch = true, const bool withRead = true, const bool withWrite = false,
-    const bool withPassive = false, const bool onlyAvailable = true,
+    const bool withPassive = false, const bool includeEmptyLevel = true, const bool onlyAvailable = true,
     const time_t since = 0, const time_t until = 0);
 
   /**