Defines starting with `t' in bsd/kern

• TB bsd/kern/tty.c:171
• TBF_INPROX bsd/kern/tty_tb.c:58
• TBF_POL bsd/kern/tty_tb.c:57
• TBMAXREC bsd/kern/tty_tb.c:84
• TTYDEFCHARS bsd/kern/tty.c:97