Always load the CSI driver because it contains cross-terminal mouse and CSI u handling

driver-csi.c

@@ -140,23 +140,6 @@ static int register_keys(void)
 
 static void *new_driver(TermKey *tk, const char *term)
 {
-  if(strncmp(term, "xterm", 5) == 0) {
-    // We want "xterm" or "xtermc" or "xterm-..."
-    if(term[5] != 0 && term[5] != '-' && term[5] != 'c')
-      return NULL;
-  }
-  else if(strcmp(term, "screen") == 0) {
-    /* Also apply for screen, because it might be transporting xterm-like
-     * sequences. Yes, this sucks. We shouldn't need to rely on this behaviour
-     * but there's no other way to know, and if we don't then we won't
-     * recognise its sequences.
-     */
-  }
-  else
-    return NULL;
-
-  // Excellent - we'll continue
-
   if(!keyinfo_initialised)
     if(!register_keys())
       return NULL;

t/02getkey.c

@@ -6,7 +6,7 @@ int main(int argc, char *argv[])
   TermKey   *tk;
   TermKeyKey key;
 
-  plan_tests(27);
+  plan_tests(31);
 
   tk = termkey_new_abstract("vt100", 0);
 
@@ -61,6 +61,14 @@ int main(int argc, char *argv[])
 
   is_int(termkey_get_buffer_remaining(tk), 256, "buffer free 256 after completion");
 
+  termkey_push_bytes(tk, "\033[27;5u", 7);
+
+  is_int(termkey_getkey(tk, &key), TERMKEY_RES_KEY, "getkey yields RES_KEY after Ctrl-Escape");
+
+  is_int(key.type,        TERMKEY_TYPE_KEYSYM, "key.type after Ctrl-Escape");
+  is_int(key.code.sym,    TERMKEY_SYM_ESCAPE,  "key.code.sym after Ctrl-Escape");
+  is_int(key.modifiers,   TERMKEY_KEYMOD_CTRL, "key.modifiers after Ctrl-Escape");
+
   termkey_destroy(tk);
 
   return exit_status();

t/30mouse.c

@@ -12,8 +12,7 @@ int main(int argc, char *argv[])
 
   plan_tests(60);
 
-  /* vt100 doesn't have a mouse, we need xterm */
-  tk = termkey_new_abstract("xterm", 0);
+  tk = termkey_new_abstract("vt100", 0);
 
   termkey_push_bytes(tk, "\e[M !!", 6);