===
==============================================================================
+------------------------------------------------------------------------------
+--- Functionality changes from Asterisk 17.0.0 to Asterisk 18.0.0 ------------
+------------------------------------------------------------------------------
+
+chan_pjsip
+------------------
+ * The PJSIP_SEND_SESSION_REFRESH dialplan function now issues a warning, and
+ returns unsuccessful if it's used on a channel prior to answering.
+
+logger
+------------------
+ * Added a new log formatter called "plain" that always prints
+ file, function and line number if available (even for verbose
+ messages) and never prints color control characters. Most
+ suitable for file output but can be used for other channels
+ as well.
+
+ You use it in logger.conf like so:
+ debug => [plain]debug
+ console => [plain]error,warning,debug,notice,pjsip_history
+ messages => [plain]warning,error,verbose
+
------------------------------------------------------------------------------
--- New functionality introduced in Asterisk 18.0.0 --------------------------
------------------------------------------------------------------------------
+++ /dev/null
-Subject: logger
-
-Added a new log formatter called "plain" that always prints
-file, function and line number if available (even for verbose
-messages) and never prints color control characters. Most
-suitable for file output but can be used for other channels
-as well.
-
-You use it in logger.conf like so:
-debug => [plain]debug
-console => [plain]error,warning,debug,notice,pjsip_history
-messages => [plain]warning,error,verbose