Reintroduce md_init_ctx compatibility wrapper
diff --git a/include/mbedtls/md.h b/include/mbedtls/md.h
index c750d6a..db85701 100644
--- a/include/mbedtls/md.h
+++ b/include/mbedtls/md.h
@@ -125,6 +125,31 @@
*/
void md_free( md_context_t *ctx );
+#if ! defined(POLARSSL_DEPRECATED_REMOVED)
+#if defined(POLARSSL_DEPRECATED_WARNING)
+#define DEPRECATED __attribute__((deprecated))
+#else
+#define DEPRECATED
+#endif
+/**
+ * \brief Initialises and fills the message digest context structure
+ * with the appropriate values.
+ *
+ * \deprecated Superseded by md_setup() in 2.0.0
+ *
+ * \param ctx context to initialise. May not be NULL. The
+ * digest-specific context (ctx->md_ctx) must be NULL. It will
+ * be allocated, and must be freed using md_free() later.
+ * \param md_info message digest to use.
+ *
+ * \returns \c 0 on success, \c POLARSSL_ERR_MD_BAD_INPUT_DATA on
+ * parameter failure, \c POLARSSL_ERR_MD_ALLOC_FAILED if
+ * allocation of the digest-specific context failed.
+ */
+int md_init_ctx( md_context_t *ctx, const md_info_t *md_info ) DEPRECATED;
+#undef DEPRECATED
+#endif /* POLARSSL_DEPRECATED_REMOVED */
+
/**
* \brief Initialises and fills the message digest context structure
* with the appropriate values.