init.d/bootmisc.in: prevent error due to nonexistant file
During boot if the "previous_dmesg" setting is enabled in /etc/conf.d/bootmisc then during the 1st boot of a machine the bootmisc init.d script will attempt to move a nonexistant dmesg file, so generating an error on the console. Modify the script to only move an existing file.
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@ -226,7 +226,7 @@ start()
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case "$RC_SYS" in
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VSERVER|OPENVZ|LXC|SYSTEMD-NSPAWN) ;;
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*)
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if yesno ${previous_dmesg:-no}; then
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if yesno ${previous_dmesg:-no} && [ -e /var/log/dmesg ]; then
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mv /var/log/dmesg /var/log/dmesg.old
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fi
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dmesg > /var/log/dmesg
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