+ * This code is Copyright (c) 2002, by the authors of nmh. See the
+ * COPYRIGHT file in the root directory of the nmh distribution for
+ * complete copyright information.
+ *
+ * Four new options have been added: delete, list, number, and draft.
+ * Message header fields are used by the new MIME attachment code in
+ * the send command. Adding features to generalize the anno command
+ * seemed to be a better approach than the creation of a new command
+ * whose features would overlap with those of the anno command.
+ *
+ * The -draft option causes anno to operate on the current draft file
+ * instead of on a message sequence.
+ *
+ * The -delete option deletes header elements that match the -component
+ * field name. If -delete is used without the -text option, the first
+ * header field whose field name matches the component name is deleted.
+ * If the -delete is used with the -text option, and the -text argument
+ * begins with a /, the first header field whose field name matches the
+ * component name and whose field body matches the text is deleted. If
+ * the -text argument does not begin with a /, then the text is assumed
+ * to be the last component of a path name, and the first header field
+ * whose field name matches the component name and a field body whose
+ * last path name component matches the text is deleted. If the -delete
+ * option is used with the new -number option described below, the nth
+ * header field whose field name matches the component name is deleted.
+ * No header fields are deleted if none of the above conditions are met.
+ *
+ * The -list option outputs the field bodies from each header field whose
+ * field name matches the component name, one per line. If no -text
+ * option is specified, only the last path name component of each field
+ * body is output. The entire field body is output if the -text option
+ * is used; the contents of the -text argument are ignored. If the -list
+ * option is used in conjuction with the new -number option described
+ * below, each line is numbered starting with 1. A tab separates the
+ * number from the field body.
+ *
+ * The -number option works with both the -delete and -list options as
+ * described above. The -number option takes an optional argument. A
+ * value of 1 is assumed if this argument is absent.