Docs: Add note on -D commandline option restriction. Bug 1154

diff --git a/doc/doc-docbook/spec.xfpt b/doc/doc-docbook/spec.xfpt
index d7d981ea744bb83650621c75d6c57ee673f37f10..a8b7af4f9b3d76da872d2f6c09f37bcfff2c7dc2 100644 (file)
--- a/doc/doc-docbook/spec.xfpt
+++ b/doc/doc-docbook/spec.xfpt
@@ -3552,6 +3552,9 @@ example:
 exim '-D ABC = something' ...
 .endd
 &%-D%& may be repeated up to 10 times on a command line.
+.new
+Only macro names up to 22 letters long can be set.
+.wen
 
 
 .vitem &%-d%&<&'debug&~options'&>