3 files changed, 19 insertions, 3 deletions
diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index 9637b5194..61cdc1ee1 100644
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -2937,6 +2937,7 @@ use the &'exim_dbmbuild'& utility, or some other means, to rebuild alias files
 if this is required. If the &%bi_command%& option is not set, calling Exim with
 &%-bi%& is a no-op.
 
+.new
 .vitem &%-bI:help%&
 .oindex "&%-bI:help%&"
 .cindex "querying exim information"
@@ -2955,6 +2956,7 @@ useful for ManageSieve (RFC 5804) implementations, in providing that protocol's
 &`SIEVE`& capability response line.  As the precise list may depend upon
 compile-time build options, which this option will adapt to, this is the only
 way to guarantee a correct response.
+.wen
 
 .vitem &%-bm%&
 .oindex "&%-bm%&"
@@ -3069,6 +3071,12 @@ configuration file is output.
 If a list of configuration files was supplied, the value that is output here
 is the name of the file that was actually used.
 
+.new
+.cindex "options" "hiding name of"
+If the &%-n%& flag is given, then for most modes of &%-bP%& operation the
+name will not be output.
+.wen
+
 .cindex "daemon" "process id (pid)"
 .cindex "pid (process id)" "of daemon"
 If &%log_file_path%& or &%pid_file_path%& are given, the names of the
@@ -3930,9 +3938,9 @@ for that message.
 
 .vitem &%-n%&
 .oindex "&%-n%&"
-.cindex "Sendmail compatibility" "&%-n%& option ignored"
-This option is interpreted by Sendmail to mean &"no aliasing"&. It is ignored
-by Exim.
+This option is interpreted by Sendmail to mean &"no aliasing"&.
+For normal modes of operation, it is ignored by Exim.
+When combined with &%-bP%& it suppresses the name of an option from being output.
 
 .vitem &%-O%&&~<&'data'&>
 .oindex "&%-O%&"
diff --git a/doc/doc-txt/ChangeLog b/doc/doc-txt/ChangeLog
index d79f4eefe..533ce5035 100644
--- a/doc/doc-txt/ChangeLog
+++ b/doc/doc-txt/ChangeLog
@@ -6,6 +6,9 @@ Exim version 4.81
 
 PP/01 Add -bI: framework, and -bI:sieve for querying sieve capabilities.
 
+PP/02 Make -n do something, by making it not do something.
+      When combined with -bP, the name of an option is not output.
+
 
 Exim version 4.80
 -----------------
diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index 71f1e8ee3..5088a24c4 100644
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -15,6 +15,11 @@ Version 4.81
     query this to establish the correct list to include in the protocol's
     SIEVE capability line.
 
+ 2. If the -n option is combined with the -bP option, then the name of an
+    emitted option is not output, only the value (if visible to you).
+    For instance, "exim -n -bP pid_file_path" should just emit a pathname
+    followed by a newline, and no other text.
+
 
 Version 4.80
 ------------