Finit v4.10

Changes

• Add support for cleanup:[0-3600,]script, runs before service is
  removed, unlike post:script that runs when service is stopped
• Improved entropy gathering in tertiary fallback of urandom plugin
• Reclassify sysv from run/task class to service

Fixes

• Fix #427: using an external getty with custom login program cause
  Finit to use login program as the getty command
• Fix #428: allow sysctl path to be set at build time
• Fix #429: regression in v4.9 causing Finit to segfault at shutdown
• Fix possible memory leak when sourcing a service env:file
• Finit now waits until all post:scripts have run before returning
  OK to initctl <reload|runlevel>. This also applies to the new
  cleanup:scripts introduced in this release
• RFC3154 conformance formatting fix for /dev/kmsg fallback logging