Add echo flag.

protocols/ssh/include/terminal.h

@@ -75,6 +75,14 @@ struct guac_terminal {
      */
     pthread_mutex_t lock;
 
+    /**
+     * Whether input should be echoed when keys are pressed. Normally, the
+     * terminal on the side of the SSH server will handle this automatically,
+     * and this flag will need to be cleared. When SSH is not yet connected,
+     * this flag would need to be set for input to be visible.
+     */
+    bool echo;
+
     /**
      * The relative offset of the display. A positive value indicates that
      * many rows have been scrolled into view, zero indicates that no

protocols/ssh/src/terminal.c

@@ -94,6 +94,7 @@ guac_terminal* guac_terminal_create(guac_client* client,
     term->scroll_end = term->term_height - 1;
 
     term->text_selected = false;
+    term->echo = true;
 
     /* Size display */
     guac_terminal_display_resize(term->display,