Editwin prompt for jwrite is slightly inaccurate when disable-ctrl-d is off

[jgross@mit.edu]

In C, we use owl_function_write_setup and branch based on owl_global_get_lockout_ctrld(&g); we show Type your %s below. End with ^D or a dot on a line by itself. ^C will quit. if disable-ctrl-d is off, and Type your %s below. End with a dot on a line by itself. ^C will quit. otherwise. For jwrite, we unconditionally show the second message.