various spelling fixes

Reviewed-by: Richard Levitte <levitte@openssl.org>
Reviewed-by: Rich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/952)
diff --git a/test/dhtest.c b/test/dhtest.c
index fb1c2df..964fb44 100644
--- a/test/dhtest.c
+++ b/test/dhtest.c
@@ -635,7 +635,7 @@
     OPENSSL_free(Z1);
     OPENSSL_free(Z2);
 
-    fprintf(stderr, "Initalisation error RFC5114 set %d\n", i + 1);
+    fprintf(stderr, "Initialisation error RFC5114 set %d\n", i + 1);
     ERR_print_errors_fp(stderr);
     return 0;
  err: