Rename len to bitlen in function parameters
Clarify a few comments too.
diff --git a/include/mbedtls/md_internal.h b/include/mbedtls/md_internal.h
index 8cc8c5b..fe0feb3 100644
--- a/include/mbedtls/md_internal.h
+++ b/include/mbedtls/md_internal.h
@@ -52,10 +52,10 @@
/** Name of the message digest */
const char * name;
- /** Output length of the digest function */
+ /** Output length of the digest function in bytes */
int size;
- /** Block length of the digest function */
+ /** Block length of the digest function in bytes */
int block_size;
/** Digest initialisation function */