Merge {groups,vars}/ w/ extended ${PKG_INSTALL_V2} DSL.
    
    files/{autoconf_2_64_host,busybox,install_strip_host,libxml2,pkgconf,{pkgconf,python2,rpm,texinfo}_host}/*, etc/{busyboxconfig,python2.7-config}: added/moved.
    groups/000.host_tools.group:auto{conf_2_64,make_1_11_6}_host:${PKG_INSTALL_FILES_V2}: merged.
    groups/000.host_tools.group:install_strip_host:${PKG_BUILD_STEPS_DISABLE}: disable "build install_make install_rpm".
    groups/000.host_tools.group:install_strip_host:${PKG_INSTALL_FILES_V2}: merged.
    groups/000.host_tools.group:pkgconf_host:${PKG_INSTALL_FILES_V2}: merged.
    groups/010.host_deps.group:chainport_host:${PKG_BUILD_STEPS_DISABLE}: disable "build install_make install_rpm".
    groups/010.host_deps.group:chainport_host:${PKG_PREFIX}: removed.
    groups/010.host_deps.group:{chainport,clzip,cmake,dbus,libffi,libzip,mdso,ncursesw,perk,python[23],texinfo,tzdb}_host:${PKG_INSTALL_FILES_V2}: merged/updated.
    groups/020.host_deps_rpm.group:rpm_host:${PKG_INSTALL_FILES_V2}: merged.
    groups/030.host_toolchain.group:{binutils,ldso,nasm}_host:${PKG_INSTALL_FILES_V2}: merged/updated.
    groups/100.native_tools.group:{mdso,perk,pkgconf}:${PKG_INSTALL_FILES_V2}: merged.
    groups/110.native_toolchain.group:binutils:${PKG_INSTALL_FILES_V2}: merged.
    groups/120.native_runtime.group:{ldso,ntux,psxscl_strace}:${PKG_INSTALL_FILES_V2}: updated.
    groups/211.native_packages_cmdline.group:{busybox,dash.dos2unix,mksh,ninvaders,openbsd_baseutils,pixz,tree,terminally_tetris}:${PKG_INSTALL_FILES_V2}: merged/updated.
    groups/221.native_packages_dev.group:{gdb,lua,python3}:${PKG_INSTALL_FILES_V2}: updated.
    groups/231.native_packages_etc.group:{apr_util,bochs,bzip2,clzip,doomgeneric,hastyhex,john,ncursesw,p7zip,vim}:${PKG_INSTALL_FILES_V2}: updated.
    groups/251.native_packages_lib.group:{lib{ffi,jpeg_turbo,solv,ssh,xml2,zip},nettle,wolfssl}:${PKG_INSTALL_FILES_V2}: merged/updated.
    groups/251.native_packages_lib.group:nettle:${PKG_CONFIG_CACHE_EXTRA}: merged.
    groups/261.native_packages_x11.group:{glew,st}:${PKG_INSTALL_FILES_V2}: updated.
    groups/800.minipix.group:{bash,bzip2,dash,dropbear}_minipix:${PKG_INSTALL_FILES_V2}: updated.
    vars/{{autoconf_2_64,automake_1_11_6,chainport,dbus,install_strip,nasm,pkgconf,rpm,texinfo,tzdb}_host,nettle,pkgconf{,_host}}.vars: deleted.