|Subject:||In documentation, replace RFC-1521 by RFC-2045|
The documentation says: "When encoding, the input is read 45 bytes at a time: this ensures that the output lines are not too long. We chose 45 since it is a multiple of 3 and produces lines under 76 characters, as RFC-1521 specifies." But RFC-1521 has been obsoleted by RFCs 2045 to 2049 and is no longer available everywhere. The section on base64 encoding is now in RFC 2045, hence the suggested change.