Massive constification.

apps/dgst.c

diff --git a/apps/dgst.c b/apps/dgst.c
index 86d60c5..eb7462d 100644
--- a/apps/dgst.c
+++ b/apps/dgst.c
@@ -85,10 +85,10 @@
 	{
 	unsigned char *buf=NULL;
 	int i,err=0;
-	EVP_MD *md=NULL,*m;
+	const EVP_MD *md=NULL,*m;
 	BIO *in=NULL,*inp;
 	BIO *bmd=NULL;
-	char *name;
+	const char *name;
 #define PROG_NAME_SIZE  16
         char pname[PROG_NAME_SIZE];
 	int separator=0;