Enable apps to get a UI_METHOD for the default prompter

Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/2204)

apps/apps.c

@@ -245,6 +245,11 @@ void destroy_ui_method(void)
         ui_method = NULL;
     }
 }
+
+const UI_METHOD *get_ui_method(void)
+{
+    return ui_method;
+}
 #endif
 
 int password_callback(char *buf, int bufsiz, int verify, PW_CB_DATA *cb_tmp)

apps/apps.h

@@ -389,6 +389,7 @@ int password_callback(char *buf, int bufsiz, int verify, PW_CB_DATA *cb_data);
 
 int setup_ui_method(void);
 void destroy_ui_method(void);
+const UI_METHOD *get_ui_method(void);
 
 int chopup_args(ARGS *arg, char *buf);
 # ifdef HEADER_X509_H