Add -m parameter to useradd commands in LC.users.addUser

function LC.users.addUser(user, group, home, shell)


  LC.log.print(LC.log.INFO, "Adding system account '", user, "'")


  if shell == "sh" then
    shell = "/bin/bash"
  elseif shell == "scponly" then
    if LC.fs.is_file("/usr/bin/rssh") then
      shell = "/usr/bin/rssh"
    else
      shell = "/usr/bin/scponly" 
    end
  elseif shell == "nologin" then
    if LC.fs.is_file("/sbin/nologin") then
      shell = "/sbin/nologin"
    else
      shell = "/usr/sbin/nologin" 
    end
  else
    shell = "/bin/false"
  end


  if LC.distribution.family == "Debian" then
    useradd = "/usr/sbin/useradd -m -d " .. home .. " -g " .. group .. " " .. "-s " .. shell .. " " .. user
  elseif LC.distribution.family == "SunOS" then
    useradd = "useradd -m -d " .. home .. " -g " .. group .. " " .. "-s " .. shell .. " " .. user
  elseif LC.distribution.family == "RedHat" then
    useradd = "/usr/sbin/useradd -m -d " .. home .. " -M -g " .. group .. " " .. "-s " .. shell .. " " .. user
  elseif LC.distribution.family == "SUSE" then
    useradd = "useradd -m -d " .. home .. " -g " .. group .. " " .. "-s " .. shell .. " " .. user
  elseif LC.distribution.family == "BSD" then
    useradd = "pw useradd " .. user .. "-m  -d " .. home .. " -g" .. group .. " -s" .. shell .. " -c ''" 
  elseif LC.distribution.family == "Gentoo" then
    useradd = "/usr/sbin/useradd -m -d " .. home .. " -g " .. group .. " " .. "-s " .. shell .. " " .. user
  end


  local rc = LC.exec(useradd)


  if rc ~= 0 then
    return false, "Error while adding user '" .. user .. "' (exit code: " .. rc .. ")"
  end


  if LC.hooks then
    LC.hooks.check("LC.users.addUser", user, group, home, shell)
  end


  return true


end