Update manual pages

doc/h2load.1

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-.TH "H2LOAD" "1" "Dec 19, 2017" "1.29.0" "nghttp2"
+.TH "H2LOAD" "1" "Feb 02, 2018" "1.30.0" "nghttp2"
 .SH NAME
 h2load \- HTTP/2 benchmarking tool
 .

doc/nghttp.1

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-.TH "NGHTTP" "1" "Dec 19, 2017" "1.29.0" "nghttp2"
+.TH "NGHTTP" "1" "Feb 02, 2018" "1.30.0" "nghttp2"
 .SH NAME
 nghttp \- HTTP/2 client
 .

doc/nghttpd.1

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-.TH "NGHTTPD" "1" "Dec 19, 2017" "1.29.0" "nghttp2"
+.TH "NGHTTPD" "1" "Feb 02, 2018" "1.30.0" "nghttp2"
 .SH NAME
 nghttpd \- HTTP/2 server
 .

doc/nghttpx.1

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-.TH "NGHTTPX" "1" "Dec 19, 2017" "1.29.0" "nghttp2"
+.TH "NGHTTPX" "1" "Feb 02, 2018" "1.30.0" "nghttp2"
 .SH NAME
 nghttpx \- HTTP/2 proxy
 .
@@ -228,6 +228,13 @@ the   same   <PATTERN>.    It    is   advised   to   set
 "redirect\-if\-no\-tls"    parameter   to    all   backends
 explicitly if this feature is desired.
 .sp
+If "upgrade\-scheme"  parameter is used along  with "tls"
+parameter, HTTP/2 :scheme pseudo header field is changed
+to "https" from "http" when forwarding a request to this
+particular backend.  This is  a workaround for a backend
+server  which  requires  "https" :scheme  pseudo  header
+field on TLS encrypted connection.
+.sp
 Since ";" and ":" are  used as delimiter, <PATTERN> must
 not  contain these  characters.  Since  ";" has  special
 meaning in shell, the option value must be quoted.

doc/nghttpx.1.rst

@@ -212,6 +212,13 @@ Connections
     "redirect-if-no-tls"    parameter   to    all   backends
     explicitly if this feature is desired.
 
+    If "upgrade-scheme"  parameter is used along  with "tls"
+    parameter, HTTP/2 :scheme pseudo header field is changed
+    to "https" from "http" when forwarding a request to this
+    particular backend.  This is  a workaround for a backend
+    server  which  requires  "https" :scheme  pseudo  header
+    field on TLS encrypted connection.
+
     Since ";" and ":" are  used as delimiter, <PATTERN> must
     not  contain these  characters.  Since  ";" has  special
     meaning in shell, the option value must be quoted.