controlperm controls how the news system responds to control messages
(specifically, at the moment,
rmgroup control messages).
Its an ASCII text file,
each line consisting of four fields separated by white space.
The first field is a newsgroup pattern,
as described in
specifying the newsgroup(s) to which the line applies.
The second field is either any or an Internet-style mail address.
If the latter form is used,
the line applies only to control messages from that author
(with that address in the From header).
The third field is a set of
opcode letters indicating which control messages
the line applies to:
The opcode letters can be in any order,
e.g. either nr or rn indicates applicability to both
The fourth field is a set of flag letters indicating
how to respond to a control message that meets all the applicability
n must be present.
In the absence of both
v, the message is reported using a terse format.
Dont do it.
Dont report it at all.
Report it, and include the entire
control message in the report.
The first line which is applicable to a control message governs
the response to that control message.
If no line is applicable,
the message is handled as if there
was an applicable line with flag letters