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/md.h b/include/mbedtls/md.h
index 77c2c6f..b902355 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -1,5 +1,5 @@
 /**
- * \file mbedtls_md.h
+ * \file md.h
  *
  * \brief Generic message digest wrapper
  *