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-rw-r--r--lib/README.http215
1 files changed, 12 insertions, 3 deletions
diff --git a/lib/README.http2 b/lib/README.http2
index eaa02fa0e..daa633834 100644
--- a/lib/README.http2
+++ b/lib/README.http2
@@ -31,11 +31,20 @@ HTTP2 with libcurl
option that will cause libcurl to fail if not possible to use http2.
Consider options to explicitly disable ALPN and/or NPN.
+ ALPN is the TLS extension that http2 is expected to use. The NPN extension
+ is for a similar purpose, was made prior to ALPN and is used for SPDY so
+ early http2 servers are implemented using NPN before ALPN support is
+ widespread.
+
SSL libs
- The challange is the ALPN and NPN support and all our different SSL
- backends. Right now we support ALPN and NPN with OpenSSL and ALPN with
- GnuTLS.
+ The challenge is the ALPN and NPN support and all our different SSL
+ backends. You may need a fairly updated SSL library version for it to
+ provide the necessary TLS features. Right now we support:
+
+ OpenSSL: ALPN and NPN
+ NSS: ALPN and NPN
+ GnuTLS: ALPN
Applications