Various fixes to doxygen API generation

 * Fixed incorrect file definitions
 * Fixed accidental tag problems in ecjpake.h
 * Corrected function naming in X.509 module definition
diff --git a/include/mbedtls/md4.h b/include/mbedtls/md4.h
index 12cb81d..45214d4 100644
--- a/include/mbedtls/md4.h
+++ b/include/mbedtls/md4.h
@@ -1,5 +1,5 @@
 /**
- * \file mbedtls_md4.h
+ * \file md4.h
  *
  * \brief MD4 message digest algorithm (hash function)
  *