doc: Described the headers added by htparser.

diff --git a/doc/htparser.doc b/doc/htparser.doc
index cc69d57..40ae6ee 100644 (file)
--- a/doc/htparser.doc
+++ b/doc/htparser.doc
@@ -77,6 +77,35 @@ OPTIONS
        After having daemonized, write the PID of the new process to
        'PIDFILE'.
 
+X-ASH HEADERS
+-------------
+
+*htparser* strips away all headers from incoming requests that begin
+ with the `X-Ash-` prefix, and adds the following headers to requests:
+
+*X-Ash-Address*::
+
+       The IP address that the client connected from. May be an IPv6
+       address.
+
+*X-Ash-Port*::
+
+       The client-side port number of the TCP connection.
+
+*X-Ash-Server-Address*::
+
+       The IP address of the server where the connection was
+       accepted. May be an IPv6 address.
+
+*X-Ash-Server-Port*::
+
+       The server-side port number of the TCP connection.
+
+*X-Ash-Protocol*::
+
+       Either *http* or *https*, depending on whether the request was
+       received by the *plain* or the *ssl* handler.
+
 AUTHOR
 ------
 Fredrik Tolf <fredrik@dolda2000.com>