Added in VPOP3 8.7

This function returns a Hex string encoding of the supplied parameter

VPOP3.HexString(text)

or

VPOP3.HexString(byte-array)

It can be passed either a text string or a table containing one byte per table-entry (eg as returned from the VPOP3.HMAC or Lua Hashing Functions

It returns a string containing the Hex encoding of the string - 2 characters per byte, in lower case.

If there was an error, it returns a Nil value