correct the maximum number of sequences in the mark(1) man page

also add a note explaining the somewhat low limit.

diff --git a/man/mark.man b/man/mark.man
index eff4bf0..130b4fd 100644 (file)
--- a/man/mark.man
+++ b/man/mark.man
@@ -153,7 +153,9 @@ be one of the (reserved) message names \*(lqnew\*(rq, \*(lqfirst\*(rq,
 .PP
 .IP \(bu 2
 Only a certain number of sequences may be defined for a given folder.
-This number is usually limited to 26 (10 on small systems).
+This number is usually limited to 27 (11 on small systems).  (The
+internal implementation relies on bitmasks, with some bits set aside
+for internal use.)
 .PP
 .IP \(bu 2
 Message ranges with user\-defined sequence names are restricted to the