v1.4.2: Changes since 1.4.1:

-- improve build/CI-friendlyness

• travis: switch to F32 as build-host
  switch to F32 & leap-15.2
  changes for mock-2.0
  turn off loop-devices & device-mapper on x86_64 targets because
  of changes in GCE
• regressions.sh: get timeouts from disk-header to go with proper defaults
  for architecture
• use configure for watchdog-default-timeout & others
• ship sbd.pc with basic sbd build information for downstream packages
  to use
• add number of commits since version-tag to build-counter

-- add robustness against misconfiguration / improve documentation

• add environment section to man-page previously just available in
  template-config
• inform the user to restart the sbd service after disk-initialization
• refuse to start if any of the configured device names is invalid
• add handshake to sync startup/shutdown with pacemakerd
  Previously sbd just waited for the cib-connnection to show up/go away
  which isn't robust at all.
  The new feature needs new pacemakerd-api as counterpart.
  Thus build checks for presence of pacemakerd-api.
  To simplify downstream adoption behavior is configurable at runtime
  via configure-file with a build-time-configurable default.
• refuse to start if qdevice-sync_timeout doesn't match watchdog-timeout
  Needed in particular as qdevice-sync_timeout delays quorum-state-update
  and has a default of 30s that doesn't match the 5s watchdog-timeout
  default.

-- misc fixes

• Fix: sbd-pacemaker: handle new no_quorum_demote + robustness against new
  policies added
• Fix: agent: correctly compare string values when calculating timeout
• Fix: scheduling: overhaul the whole thing
  • prevent possible lockup when format in proc changes
  • properly get and handle scheduler policy & prio
  • on SCHED_RR failing push to the max with SCHED_OTHER