_gl_configure_getline
static int _gl_configure_getline(GetLine *gl, const char *app_string,
(void) _gl_configure_getline(gl, NULL, NULL, TECLA_CONFIG_FILE);
(void) _gl_configure_getline(gl, NULL, NULL, TECLA_CONFIG_FILE);
(void) _gl_configure_getline(gl, NULL, NULL, TECLA_CONFIG_FILE);
status = _gl_configure_getline(gl, app_string, app_file, user_file);
return _gl_configure_getline(gl, NULL, gl->app_file, gl->user_file);