Add restart option to clvmd

This patch adds a restart command to clvmd (clvmd -S) that restarts the daemon preserving exclusive locks. This will not work if clvmd is downgraded because the old clvmd does not understand the -E switches.

Chrissie
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Name: clvmd-restart.patch
URL: <http://listman.redhat.com/archives/lvm-devel/attachments/20100419/6c867540/attachment.ksh>