A zombie process occurs when using https ping on a URL caused by busybox wget

[qianlongzt]

/data $ ps -o pid,ppid,pgid,user,stat,comm
PID   PPID  PGID  USER     STAT COMMAND
    1     0     1 1000     S    supercronic
   51     0    51 1000     S    sh
   57    51    57 1000     R    ps
/data $ wget https://google.com -o /dev/null -q
/data $ ps -o pid,ppid,pgid,user,stat,comm
PID   PPID  PGID  USER     STAT COMMAND
    1     0     1 1000     S    supercronic
   51     0    51 1000     S    sh
   59     1    58 1000     Z    ssl_client
   60     1    58 1000     Z    ssl_client
   61    51    61 1000     R    ps

spinnaker/spinnaker#4479
qdm12/gluetun#1494 (comment)

[ttionya]

Thank you for reporting the error and for the PR.

Initially, BusyBox's wget was used because it is built into Alpine and does not take up additional space. Compared to adding a wget dependency, I prefer to add curl and replace wget with curl. Curl provides comprehensive functionality and may be used in PR #161.

I will fix this issue along with PR #161, so I will close your PR for now.

Thanks again.