init script: be LSB compliant for exit code on status

init script: be LSB compliant for exit code on status

An exit code of 1 on status is defined in LSB as
"program is dead, but pid file exists". Check for existence
of this pid file, and only set the exit status 1 if it's still there.
Set it to 3 ("program is not running") otherwise.

Reference: http://refspecs.linuxbase.org/LSB_3.1.0/LSB-Core-generic/LSB-Core-generic/iniscrptact.html

Signed-off-by: Florian Haas <florian@hastexo.com>