Cleanup of custom extension stuff.

serverinfo rejects non-empty extensions.

Omit extension if no relevant serverinfo data.

Improve error-handling in serverinfo callback.

Cosmetic cleanups.

s_client documentation.

s_server documentation.

SSL_CTX_serverinfo documentation.

Cleaup -1 and NULL callback handling for custom extensions, add tests.

Cleanup ssl_rsa.c serverinfo code.

Whitespace cleanup.

Improve comments in ssl.h for serverinfo.

Whitespace.

Cosmetic cleanup.

Reject non-zero-len serverinfo extensions.

Whitespace.

Make it build.

doc/ssl/SSL_CTX_use_serverinfo.pod

@@ -0,0 +1,45 @@
+=pod
+
+=head1 NAME
+
+SSL_CTX_use_serverinfo, SSL_CTX_use_serverinfo_file
+
+=head1 SYNOPSIS
+
+ #include <openssl/ssl.h>
+
+ int SSL_CTX_use_serverinfo(SSL_CTX *ctx, const unsigned char *serverinfo,
+                            size_t serverinfo_length);
+
+ int SSL_CTX_use_serverinfo_file(SSL_CTX *ctx, const char *file);
+
+=head1 DESCRIPTION
+
+These functions load "serverinfo" TLS ServerHello Extensions into the SSL_CTX.
+A "serverinfo" extension is returned in response to an empty ClientHello
+Extension.
+
+SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions from
+a byte array into B<ctx>. The extensions must be concatenated into a 
+sequence of bytes.  Each extension must consist of a 2-byte Extension Type, 
+a 2-byte length, and then length bytes of extension_data.
+
+SSL_CTX_use_serverinfo_file() loads one or more serverinfo extensions from
+B<file> into B<ctx>. The extensions must be in PEM format.  Each extension
+must consist of a 2-byte Extension Type, a 2-byte length, and then length
+bytes of extension_data.
+
+=head1 NOTES
+
+=head1 RETURN VALUES
+
+On success, the functions return 1.
+On failure, the functions return 0.  Check out the error stack to find out
+the reason.
+
+=head1 SEE ALSO
+
+=head1 HISTORY
+
+
+=cut