logging vty: deprecate the 'everything' keyword

The 'logging level all everything' has not had an effect for some time now. The
plan is to bring back its old functionality, but to keep it deprecated and
rather define a less confusing name.

* Deprecate 'everything'.
* Do not write 'everything' during 'write file' or 'show running-config', which
  we curiously still do until now.

BTW, the reason why we need to compose a complete list of categories for the
deprecated 'everything' command is explained in detail in the commit log for
I3b083f27e3d751ccec258880ae7676e9af959a63

Change-Id: Ib75fedb0572570a61bb34ee729a2af86cf5f16da
diff --git a/tests/logging/logging_vty_test.vty b/tests/logging/logging_vty_test.vty
index c57b70f..a2c1e74 100644
--- a/tests/logging/logging_vty_test.vty
+++ b/tests/logging/logging_vty_test.vty
@@ -1,11 +1,9 @@
 logging_vty_test> enable
 
-logging_vty_test# ! Note that 'logging level all everything' is still printed!
 logging_vty_test# show running-config
 ...
 log stderr
-...
-  logging level all everything
+... !logging level all
   logging level aa debug
   logging level bb info
   logging level ccc notice
@@ -39,7 +37,7 @@
   logging print level (0|1)
   logging print file (0|1|basename) [last]
   logging set-log-mask MASK
-  logging level (all|aa|bb|ccc|dddd|eee|lglobal|llapd|linp|lmux|lmi|lmib|lsms|lctrl|lgtp|lstats|lgsup|loap|lss7|lsccp|lsua|lm3ua|lmgcp|ljibuf) (everything|debug|info|notice|error|fatal)
+  logging level (all|aa|bb|ccc|dddd|eee|lglobal|llapd|linp|lmux|lmi|lmib|lsms|lctrl|lgtp|lstats|lgsup|loap|lss7|lsccp|lsua|lm3ua|lmgcp|ljibuf) (debug|info|notice|error|fatal)
   show logging vty
 ... !logging
 
@@ -64,20 +62,18 @@
 ...
 
 logging_vty_test# logging level aa ?
-  everything  Don't use. It doesn't log anything
-  debug       Log debug messages and higher levels
-  info        Log informational messages and higher levels
-  notice      Log noticeable messages and higher levels
-  error       Log error messages and higher levels
-  fatal       Log only fatal messages
+  debug   Log debug messages and higher levels
+  info    Log informational messages and higher levels
+  notice  Log noticeable messages and higher levels
+  error   Log error messages and higher levels
+  fatal   Log only fatal messages
 
 logging_vty_test# logging level all ?
-  everything  Don't use. It doesn't log anything
-  debug       Log debug messages and higher levels
-  info        Log informational messages and higher levels
-  notice      Log noticeable messages and higher levels
-  error       Log error messages and higher levels
-  fatal       Log only fatal messages
+  debug   Log debug messages and higher levels
+  info    Log informational messages and higher levels
+  notice  Log noticeable messages and higher levels
+  error   Log error messages and higher levels
+  fatal   Log only fatal messages
 
 
 logging_vty_test# log-sweep
@@ -181,7 +177,7 @@
 
 logging_vty_test# ! Old 'logging level all everything' has no effect
 logging_vty_test# logging level all everything
-% Ignoring deprecated logging level everything
+% Ignoring deprecated logging level 'everything' keyword
 logging_vty_test# log-sweep eee
 DEEE NOTICE Log message for DEEE on level LOGL_NOTICE
 DEEE ERROR Log message for DEEE on level LOGL_ERROR