Replace BOOL/TRUE/FALSE with bool/true/false

src/syncterm/bbslist.c

src/syncterm/bbslist.h

src/syncterm/conn.c

src/syncterm/conn.h

src/syncterm/conn_telnet.c

src/syncterm/fonts.c

src/syncterm/menu.c

src/syncterm/modem.c

src/syncterm/ooii.c

src/syncterm/ooii.h

src/syncterm/ripper.c

src/syncterm/rlogin.c

src/syncterm/ssh.c

src/syncterm/ssh.h

src/syncterm/syncterm.c

src/syncterm/syncterm.h

src/syncterm/telnets.c

src/syncterm/term.c

src/syncterm/term.h

src/syncterm/uifcinit.c