Log Message:
Actually respect PKG_SYSCONFDIR. Now that devel/apr0/buildlink3.mk
sets BUILDLINK_INCDIRS.apr, remove custom CPPFLAGS. Use -e for the
SUBST_SED expression to mollify pkglint. Add APACHE_USER and VARBASE
to BUILD_DEFS. Don't try to remove lib/httpd on deinstall, as it
belongs to Apache. Bump PKGREVISION.