Changes since 1.3.1 (#63)

• overhaul log-levels
• add Makefile for copr-builds
• make tools rather fail if disk-devices can't be accessed
• add man section for query-watchdog & test-watchdog
• prevent start of pacemaker & dlm if sbd doesn't come up
• build against Pacemaker-2.0
• build issues with glibc 2.25 and with BSD systems
• prepare for makedev going away in <sys/types.h>
• respect newer gcc versions being more picky on format-string-checking
• updated travis-CI (ppc64le-build, fedora29, remove need for alectolytic-build-container)
• make watchdog-device-query easier to be handled by an SELinux-policy
• configurable delay value for SBD_DELAY_START
• use pacemaker's new pe api with constructors/destructors
• make timeout-action executed by sbd configurable
• init script for sysv systems