Add debuglog feature.

doc/3.10-logging.md

@@ -22,9 +22,9 @@ and forward the `debug` serverity into an Icinga 2 debug file.
 
     object FileLogger "debug-file" {
       severity = "debug",
-      path = "/var/log/icinga2/icinga2-debug.log"
+      path = "/var/log/icinga2/debug.log"
     }
-    
+
 If you're starting Icinga 2 not as daemon, but in foreground
 using `/usr/bin/icinga2 -c /etc/icinga2/icinga2.conf` you may
 want to enable console logging temporary too.

etc/icinga2/features-available/Makefile.am

@@ -6,6 +6,7 @@ CONFIG_FILES = \
 	checker.conf \
 	command.conf \
 	compatlog.conf \
+	debuglog.conf \
 	graphite.conf \
 	ido-mysql.conf \
 	livestatus.conf \

etc/icinga2/features-available/debuglog.conf

@@ -0,0 +1,9 @@
+/**
+ * The FileLogger type writes log information to a log file.
+ */
+
+object FileLogger "debug-file" {
+  severity = "debug",
+  path = "/var/log/icinga2/debug.log"
+}
+