f3562b build.sh, etc/build.usage: adds -[46]: force IPv[46] when downloading.

Authored and Committed by Lucio Andrés Illanes Albornoz (arab, vxp) 7 years ago
    build.sh, etc/build.usage: adds -[46]: force IPv[46] when downloading.
    subr/pre_setup_env.subr: prepend -4 or -6 to ${WGET_ARGS} when -[46] was specified.
    
        
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