Fix things so that chains of certificates work in the server and client
certificate files.

This only really works for OpenSSL-based builds, as yassl is unable to read
multiple certificates from a file.  The patch below to yassl/src/ssl.cpp
doesn't fix that, but just arranges that the viosslfactories.c patch won't
have any ill effects in a yassl build.

See RH bug #598656.  Filed upstream at http://bugs.mysql.com/bug.php?id=54158


diff -Naur mysql-5.5.28.orig/extra/yassl/src/ssl.cpp mysql-5.5.28/extra/yassl/src/ssl.cpp
--- mysql-5.5.28.orig/extra/yassl/src/ssl.cpp	2012-08-29 04:50:46.000000000 -0400
+++ mysql-5.5.28/extra/yassl/src/ssl.cpp	2012-09-29 12:45:19.682287214 -0400
@@ -1627,10 +1627,10 @@
     }
 
 
-    int SSL_CTX_use_certificate_chain_file(SSL_CTX*, const char*)
+    int SSL_CTX_use_certificate_chain_file(SSL_CTX* ctx, const char* file)
     {
-        // TDOD:
-        return SSL_SUCCESS;
+        // For the moment, treat like use_certificate_file
+        return read_file(ctx, file, SSL_FILETYPE_PEM, Cert);
     }
 
 
diff -Naur mysql-5.5.28.orig/vio/viosslfactories.c mysql-5.5.28/vio/viosslfactories.c
--- mysql-5.5.28.orig/vio/viosslfactories.c	2012-08-29 04:50:46.000000000 -0400
+++ mysql-5.5.28/vio/viosslfactories.c	2012-09-29 12:46:35.124975585 -0400
@@ -106,7 +106,7 @@
     key_file= cert_file;
 
   if (cert_file &&
-      SSL_CTX_use_certificate_file(ctx, cert_file, SSL_FILETYPE_PEM) <= 0)
+      SSL_CTX_use_certificate_chain_file(ctx, cert_file) <= 0)
   {
     *error= SSL_INITERR_CERT;
     DBUG_PRINT("error",("%s from file '%s'", sslGetErrString(*error), cert_file));