various spelling fixes

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/952)
diff --git a/ssl/s3_enc.c b/ssl/s3_enc.c
index 35ef948..ec5ff9b 100644
--- a/ssl/s3_enc.c
+++ b/ssl/s3_enc.c
@@ -231,7 +231,7 @@
             goto err;
         else
             /*
-             * make sure it's intialized in case we exit later with an error
+             * make sure it's initialised in case we exit later with an error
              */
             EVP_CIPHER_CTX_reset(s->enc_read_ctx);
         dd = s->enc_read_ctx;
@@ -262,7 +262,7 @@
             goto err;
         else
             /*
-             * make sure it's intialized in case we exit later with an error
+             * make sure it's initialised in case we exit later with an error
              */
             EVP_CIPHER_CTX_reset(s->enc_write_ctx);
         dd = s->enc_write_ctx;