New option -g with sig

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Hello Dave,
This patch try to apply  your new function show_tgid_list() in the signal 
context.
The signal part at the task group level is first shown, then we show the 
relevant part for each task in the task group.
When it will be OK for you, i'll update the help file.

crash> sig -g 27491
SIGNAL_STRUCT: f78f8380  COUNT: 3
 SIG SIGACTION  HANDLER       MASK       FLAGS
 [1]  c1f3f104  SIG_DFL 0000000000000000 0
 [2]  c1f3f118  SIG_DFL 0000000000000000 0
 [3]  c1f3f12c  SIG_DFL 0000000000000000 0
 [4]  c1f3f140  SIG_DFL 0000000000000000 0
 [5]  c1f3f154  SIG_DFL 0000000000000000 0
 [6]  c1f3f168  SIG_DFL 0000000000000000 0
 [7]  c1f3f17c  SIG_DFL 0000000000000000 0
 [8]  c1f3f190  SIG_DFL 0000000000000000 0
 [9]  c1f3f1a4  SIG_DFL 0000000000000000 0
[10]  c1f3f1b8  804877e 0000000000000000 4 (SA_SIGINFO)
[11]  c1f3f1cc  SIG_DFL 0000000000000000 0
...
[62]  c1f3f5c8  SIG_DFL 0000000000000000 0
[63]  c1f3f5dc  SIG_DFL 0000000000000000 0
[64]  c1f3f5f0  SIG_DFL 0000000000000000 0
SHARED_PENDING
    SIGNAL: 0000000200000200
  SIGQUEUE:  SIG  SIGINFO
              10  f56f3c84
              34  f56f390c
              34  f56f3878
              34  f56f37e4
              34  f56f3060

PID: 27489  TASK: f606b560  CPU: 0   COMMAND: "sig_procthread"
SIGPENDING: no
   BLOCKED: 0000080200000a00
PRIVATE_PENDING
    SIGNAL: 0000080000000800
  SIGQUEUE:  SIG  SIGINFO
              12  f56f3f68
              44  f56f3ed4
              44  f56f3e40
              44  f56f3dac
              44  f56f3d18

  PID: 27490  TASK: f7d09020  CPU: 0   COMMAND: "sig_procthread"
  SIGPENDING: no
     BLOCKED: 0000000200000200
  PRIVATE_PENDING
      SIGNAL: 0000000000000000
    SIGQUEUE: (empty)

  PID: 27491  TASK: f544f020  CPU: 1   COMMAND: "sig_procthread"
  SIGPENDING: no
     BLOCKED: 0000000200000200
  PRIVATE_PENDING
      SIGNAL: 0000000000000000
    SIGQUEUE: (empty)


Attachment: sig.patch
Description: Binary data

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