Merge branch 'code/hygiene'

* code/hygiene:
  hygiene, coverity can't calculate so help him a bit
  hygiene, fixup sunday in __ywd_get_jan01_wday() in hang fixup branch
  hygiene, let coverity know about the range of d.hang in ywd dates
  hygiene, document deliberate fallthrough for coverity
bump, release candiate 3 of v0.3.0
bump, release v0.3.0
remove unneeded deps from INSTALL file
bump, go back to git version numbers after 0.3.0 release
Merge remote-tracking branch 'github/pull/25'

* github/pull/25:
  remove unneeded deps from INSTALL file
fix, PEBKAC, actually ship tzconv.m
Merge branch 'bld/dist'

* bld/dist:
  fix, PEBKAC, actually ship tzconv.m
chore, elaborately kick help2man, as announced has been superseded by yuck
chore, for documentary purposes add pkg-config dependency
Merge branch 'bld/ci'

* bld/ci:
  chore, for documentary purposes add pkg-config dependency
  chore, elaborately kick help2man, as announced has been superseded by yuck
minor, provide -e|--existing-only for tzmap(1)'s cc command

This will instruct the tzmap compiler only to put zones
in the map file that currently (at the time of compilation)
exist on the system.
chore, use -e|--existing-only in .tzmap->.tzmcc recipe
test, adapt tzmap regression kicking the assumption that zones have to exist
Merge branch 'core/tzmaps'

* core/tzmaps:
  test, adapt tzmap regression kicking the assumption that zones have to exist
  chore, use -e|--existing-only in .tzmap->.tzmcc recipe
  minor, provide -e|--existing-only for tzmap(1)'s cc command
minor, use less vibrant 0bX instead of 0bXU due to CentOS problems with it
Merge branch 'bld/yuck'

* bld/yuck:
  minor, use less vibrant 0bX instead of 0bXU due to CentOS problems with it
chore, update sxe-libtool.m4 macros (and their usage)
Merge branch 'bld/libtool'

* bld/libtool:
  chore, update sxe-libtool.m4 macros (and their usage)
chore, use generic octlab CFLAGS allowing for both a matlab and octave build