stty: combination settings

[tertsdiepraam]

GNU stty has several "combination settings" that are shortcuts for multiple flags. We need to support these too.

Combination settings:
 * [-]LCASE      same as [-]lcase
   cbreak        same as -icanon
   -cbreak       same as icanon
   cooked        same as brkint ignpar istrip icrnl ixon opost isig
                 icanon, eof and eol characters to their default values
   -cooked       same as raw
   crt           same as echoe echoctl echoke
   dec           same as echoe echoctl echoke -ixany intr ^c erase 0177
                 kill ^u
 * [-]decctlq    same as [-]ixany
   ek            erase and kill characters to their default values
   evenp         same as parenb -parodd cs7
   -evenp        same as -parenb cs8
 * [-]lcase      same as xcase iuclc olcuc
   litout        same as -parenb -istrip -opost cs8
   -litout       same as parenb istrip opost cs7
   nl            same as -icrnl -onlcr
   -nl           same as icrnl -inlcr -igncr onlcr -ocrnl -onlret
   oddp          same as parenb parodd cs7
   -oddp         same as -parenb cs8
   [-]parity     same as [-]evenp
   pass8         same as -parenb -istrip cs8
   -pass8        same as parenb istrip cs7
   raw           same as -ignbrk -brkint -ignpar -parmrk -inpck -istrip
                 -inlcr -igncr -icrnl -ixon -ixoff -icanon -opost
                 -isig -iuclc -ixany -imaxbel -xcase min 1 time 0
   -raw          same as cooked
   sane          same as cread -ignbrk brkint -inlcr -igncr icrnl
                 icanon iexten echo echoe echok -echonl -noflsh
                 -ixoff -iutf8 -iuclc -ixany imaxbel -xcase -olcuc -ocrnl
                 opost -ofill onlcr -onocr -onlret nl0 cr0 tab0 bs0 vt0 ff0
                 isig -tostop -ofdel -echoprt echoctl echoke -extproc -flusho,
                 all special characters to their default values