changed runit shutdown process to send TERM, HUP and INT respectively

 notes on process management

 very interesting article
   http://mywiki.wooledge.org/ProcessManagement

 from http://partmaps.org/era/unix/award.html#kill
 Useless Use of Kill -9 form letter
    No no no.  Don't use kill -9.
    It doesn't give the process a chance to cleanly:
    1) shut down socket connections
    2) clean up temp files
    3) inform its children that it is going away
    4) reset its terminal characteristics
         and so on and so on and so on.
    Generally, send 15, and wait a second or two, and if that doesn't
    work, send 2, and if that doesn't work, send 1.  If that doesn't,
    REMOVE THE BINARY because the program is badly behaved!
    Don't use kill -9.  Don't bring out the combine harvester just to tidy
    up the flower pot.
 /bin/kill --table
  1 HUP      2 INT      3 QUIT     4 ILL      5 TRAP     6 ABRT     7 BUS
  8 FPE      9 KILL    10 USR1    11 SEGV    12 USR2    13 PIPE    14 ALRM
 15 TERM    16 STKFLT  17 CHLD    18 CONT    19 STOP    20 TSTP    21 TTIN
 22 TTOU    23 URG     24 XCPU    25 XFSZ    26 VTALRM  27 PROF    28 WINCH
 29 POLL    30 PWR     31 SYS