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ShellCheck plugin for SonarQube

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In POSIX sh, /dev/{tcp,udp} is undefined.
(or "In dash, ... is not supported." when using dash)
Problematic code
echo foo > /dev/tcp/myhost/1234

Correct code
Rewrite using a tool like netcat (nc):
echo foo | nc myhost 1234

Rationale
/dev/tcp/$host/$port and /dev/udp/$host/$port are recognized in redirections by bash and ksh, and a socket connection is made instead of opening a file. They do not physically exist in /dev.
POSIX sh and dash do not support this, so any such code should be rewritten to use a socket tool explicitly. The obvious candidate is netcat aka nc.
Exceptions
None
Related resources

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