Documentation typo.

Change-Id: I2dc4253a2456625057c8188c6cb9b0b7300d6c79
Reviewed-on: https://boringssl-review.googlesource.com/5951
Reviewed-by: Adam Langley <agl@google.com>

include/openssl/digest.h

@@ -205,7 +205,7 @@ OPENSSL_EXPORT int EVP_MD_CTX_copy(EVP_MD_CTX *out, const EVP_MD_CTX *in);
  * compatibility with OpenSSL. */
 OPENSSL_EXPORT int EVP_add_digest(const EVP_MD *digest);
 
-/* EVP_get_cipherbyname returns an |EVP_MD| given a human readable name in
+/* EVP_get_digestbyname returns an |EVP_MD| given a human readable name in
  * |name|, or NULL if the name is unknown. */
 OPENSSL_EXPORT const EVP_MD *EVP_get_digestbyname(const char *);