pppd: Document chapms-strip-domain option in pppd(8) (#203)

Signed-off-by: Samuel Thibault <samuel.thibault@ens-lyon.org>

Author: sthibaul

pppd/pppd.8

@@ -303,6 +303,12 @@ to \fIn\fR seconds (default 3).
 .B chap-timeout \fIn
 Set timeout for CHAP authentication by peer to \fIn\fR seconds (default 60).
 .TP
+.B chapms\-strip\-domain
+Some Windows 9x/ME clients might be transmitting the MS domain before the
+username in the provided client name. This option enables stripping the domain
+from the client name on the server side before matching it against the secret
+file.
+.TP
 .B child\-timeout \fIn
 When exiting, wait for up to \fIn\fR seconds for any child processes
 (such as the command specified with the \fBpty\fR command) to exit