This value may be customized in various ways:
PKG_SYSCONFBASE is the main config directory under which all package
configuration files are to be found.
PKG_SYSCONFSUBDIR is the subdirectory of PKG_SYSCONFBASE under which the
configuration files for a particular package may be found.
PKG_SYSCONFDIR.${PKGBASE} overrides the value of ${PKG_SYSCONFDIR} for a
particular package.
Users will typically want to set PKG_SYSCONFBASE to /etc, or accept the
default location of ${PREFIX}/etc.
This obsoletes the use of CONFDIR, which was active for only 6 days, so no
need to have a workaround to still accept old CONFDIR settings.
foo-* to foo-[0-9]*. This is to cause the dependencies to match only the
packages whose base package name is "foo", and not those named "foo-bar".
A concrete example is p5-Net-* matching p5-Net-DNS as well as p5-Net. Also
change dependency examples in Packages.txt to reflect this.
