Bug 1081163

Description of problem:
When connecting to a server with SNI name provided in upper case, the server rejects connection.

Version-Release number of selected component (if applicable):
openssl-1.0.1e-33.el7.x86_64

How reproducible:
Always

Steps to Reproduce:
1. openssl req -x509 -newkey rsa -keyout server.key -out server.crt -subj /CN=localhost -nodes -batch
2. openssl s_server -servername localhost -servername_fatal -key2 server.key -cert2 server.crt -key server.key -cert server.crt

In another console:
1. openssl s_client -servername LOCALHOST -connect localhost:4433 -CAfile server.crt

Actual results:
Client:
CONNECTED(00000003)
140532942383008:error:14077458:SSL routines:SSL23_GET_SERVER_HELLO:tlsv1 unrecognized name:s23_clnt.c:741:
---
no peer certificate available
---
No client certificate CA names sent
---
SSL handshake has read 7 bytes and written 267 bytes
---
New, (NONE), Cipher is (NONE)
Secure Renegotiation IS NOT supported
Compression: NONE
Expansion: NONE
---



Server:
Setting secondary ctx parameters
Using default temp DH parameters
Using default temp ECDH parameters
ACCEPT
Hostname in TLS extension: "LOCALHOST"
ERROR
139702124750752:error:1408A0E2:SSL routines:SSL3_GET_CLIENT_HELLO:clienthello tlsext:s3_srvr.c:1188:
shutting down SSL
CONNECTION CLOSED
ACCEPT
^C

Expected results:
Connection established

Additional info:
RFC 3546, section 3.1:

   If the server only needs to match the HostName against names containing
   exclusively ASCII characters, it MUST compare ASCII names case-
   insensitively.

RFC 6066, section 3:

   "HostName" contains the fully qualified DNS hostname of the server,
   as understood by the client.  The hostname is represented as a byte
   string using ASCII encoding without a trailing dot.  This allows the
   support of internationalized domain names through the use of A-labels
   defined in [RFC5890].  DNS hostnames are case-insensitive.