Merge "main: Update copyright notice with year 2018"

diff --cc main/asterisk.c
index 3e5785076bd3fc00e2730be66a7113646ab1e661,6d838d0a0d67b44bd4778787732344cda8682f15..665b4be840a187be14d00eaa8fcb2a5077693cf0
--- 1/main/asterisk.c
--- 2/main/asterisk.c
+++ b/main/asterisk.c
@@@ -294,9 -294,13 +294,9 @@@ int daemon(int, int);  /* defined in li
  #define AST_MAX_CONNECTS 128
  #define NUM_MSGS 64
  
 -/*! Default minimum DTMF digit length - 80ms */
 -#define AST_MIN_DTMF_DURATION 80
 -
 -
  /*! \brief Welcome message when starting a CLI interface */
  #define WELCOME_MESSAGE \
-     ast_verbose("Asterisk %s, Copyright (C) 1999 - 2016, Digium, Inc. and others.\n" \
+     ast_verbose("Asterisk %s, Copyright (C) 1999 - 2018, Digium, Inc. and others.\n" \
                  "Created by Mark Spencer <markster@digium.com>\n" \
                  "Asterisk comes with ABSOLUTELY NO WARRANTY; type 'core show warranty' for details.\n" \
                  "This is free software, with components licensed under the GNU General Public\n" \