Fixup BIO demos for OpenSSL 1.1.x

Note: server-cmod doesn't seem to do things right...  from loading
cmod.cnf, it tries to load libssl_conf.so.

Reviewed-by: Rich Salz <rsalz@openssl.org>
diff --git a/demos/bio/server-arg.c b/demos/bio/server-arg.c
index 4e9b7bd..6056969 100644
--- a/demos/bio/server-arg.c
+++ b/demos/bio/server-arg.c
@@ -14,6 +14,7 @@
  */
 
 #include <stdio.h>
+#include <string.h>
 #include <signal.h>
 #include <openssl/err.h>
 #include <openssl/ssl.h>
@@ -30,11 +31,6 @@
     char **args = argv + 1;
     int nargs = argc - 1;
 
-    SSL_load_error_strings();
-
-    /* Add ciphers and message digests */
-    OpenSSL_add_ssl_algorithms();
-
     ctx = SSL_CTX_new(TLS_server_method());
 
     cctx = SSL_CONF_CTX_new();