[utils] setsid on start detached process
[core] restart in-place.
[core] fix fd leak with in-place restart
[utils] use execv instead of execvp for in-place restart
[misc] style fix
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[fcitx] ...bye pipe2.
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Add missing libintl include dirs
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Merge pull request #137 from HenryHu/master

Add missing libintl include dirs