# Prints out the relative path between to absolute paths. Trivial.
#
# Parameters:
# $1 = first path
# $2 = second path
#
# Output: the relative path between 1st and 2nd paths
relpath() {
    local pos="${1%%/}" ref="${2%%/}" down=''

    while :; do
        test "$pos" = '/' && break
        case "$ref" in $pos/*) break;; esac
        down="../$down"
        pos=${pos%/*}
    done

    echo "$down${ref##$pos/}"
}