Add some corrections based on code review

-Add the DHM_ALT in an alphabetical order
-Close correctly the 'extern "C" { ...'

include/mbedtls/config.h

@@ -267,6 +267,7 @@
 //#define MBEDTLS_BLOWFISH_ALT
 //#define MBEDTLS_CAMELLIA_ALT
 //#define MBEDTLS_DES_ALT
+//#define MBEDTLS_DHM_ALT
 //#define MBEDTLS_XTEA_ALT
 //#define MBEDTLS_MD2_ALT
 //#define MBEDTLS_MD4_ALT
@@ -275,7 +276,7 @@
 //#define MBEDTLS_SHA1_ALT
 //#define MBEDTLS_SHA256_ALT
 //#define MBEDTLS_SHA512_ALT
-//#define MBEDTLS_DHM_ALT
+
 
 /*
  * When replacing the elliptic curve module, pleace consider, that it is

include/mbedtls/dhm.h

@@ -296,10 +296,19 @@ int mbedtls_dhm_parse_dhm( mbedtls_dhm_context *dhm, const unsigned char *dhmin,
 int mbedtls_dhm_parse_dhmfile( mbedtls_dhm_context *dhm, const char *path );
 #endif /* MBEDTLS_FS_IO */
 #endif /* MBEDTLS_ASN1_PARSE_C */
-#else
+
+#ifdef __cplusplus
+}
+#endif
+
+#else /* MBEDTLS_DHM_ALT */
 #include "dhm_alt.h"
 #endif /* MBEDTLS_DHM_ALT */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * \brief          Checkup routine
  *

library/version_features.c

@@ -99,6 +99,9 @@ static const char *features[] = {
 #if defined(MBEDTLS_DES_ALT)
     "MBEDTLS_DES_ALT",
 #endif /* MBEDTLS_DES_ALT */
+#if defined(MBEDTLS_DHM_ALT)
+    "MBEDTLS_DHM_ALT",
+#endif /* MBEDTLS_DHM_ALT */
 #if defined(MBEDTLS_XTEA_ALT)
     "MBEDTLS_XTEA_ALT",
 #endif /* MBEDTLS_XTEA_ALT */
@@ -123,9 +126,6 @@ static const char *features[] = {
 #if defined(MBEDTLS_SHA512_ALT)
     "MBEDTLS_SHA512_ALT",
 #endif /* MBEDTLS_SHA512_ALT */
-#if defined(MBEDTLS_DHM_ALT)
-    "MBEDTLS_DHM_ALT",
-#endif /* MBEDTLS_DHM_ALT */
 #if defined(MBEDTLS_ECP_ALT)
     "MBEDTLS_ECP_ALT",
 #endif /* MBEDTLS_ECP_ALT */