trailer to the input messages. See the description of this
command.
+--where <placement>::
+--no-where::
+ Specify where all new trailers will be added. A setting
+ provided with '--where' overrides all configuration variables
+ and applies to all '--trailer' options until the next occurrence of
+ '--where' or '--no-where'.
+
+--if-exists <action>::
+--no-if-exists::
+ Specify what action will be performed when there is already at
+ least one trailer with the same <token> in the message. A setting
+ provided with '--if-exists' overrides all configuration variables
+ and applies to all '--trailer' options until the next occurrence of
+ '--if-exists' or '--no-if-exists'.
+
+--if-missing <action>::
+--no-if-missing::
+ Specify what action will be performed when there is no other
+ trailer with the same <token> in the message. A setting
+ provided with '--if-missing' overrides all configuration variables
+ and applies to all '--trailer' options until the next occurrence of
+ '--if-missing' or '--no-if-missing'.
+
--only-trailers::
Output only the trailers, not any other parts of the input.
configuration variable and it overrides what is specified by
that option for trailers with the specified <token>.
-trailer.<token>.ifexist::
- This option takes the same values as the 'trailer.ifexist'
+trailer.<token>.ifexists::
+ This option takes the same values as the 'trailer.ifexists'
configuration variable and it overrides what is specified by
that option for trailers with the specified <token>.