- Changed the used random function pointer to more flexible format. Renamed havege_rand() to havege_random() to prevent mistakes. Lots of changes as a consequence in library code and programs

diff --git a/programs/pkey/dh_client.c b/programs/pkey/dh_client.c
index ab7b9a6..7b13e91 100644
--- a/programs/pkey/dh_client.c
+++ b/programs/pkey/dh_client.c
@@ -207,7 +207,7 @@
 
     n = dhm.len;
     if( ( ret = dhm_make_public( &dhm, 256, buf, n,
-                                 havege_rand, &hs ) ) != 0 )
+                                 havege_random, &hs ) ) != 0 )
     {
         printf( " failed\n  ! dhm_make_public returned %d\n\n", ret );
         goto exit;