fix include path priority.
Define some macros for DCS processing
Avoid using magic strings
Cleanup
Prohibit use of -8 and -P options at same time
Merge branch 'master' into release-1.4
Merge branch 'develop' into release-1.4
Merge branch 'hotfix-include-path-priority' into release-1.4

Conflicts:
	converters/Makefile.am
	converters/Makefile.in
Merge branch 'release-1.4' into hotfix-include-path-priority
Define _ALL_SOURCE only in Interix environment
Merge branch 'hotfix-include-path-priority' into release-1.4
Merge branch 'hotfix-adjust-gnu-screen-packet-size' into release-1.4
Update ChangeLog and NEWS
Bump version
Merge branch 'release-1.4'
Merge branch 'master' into develop
Strip an unreached return statement
Minor style improvement