Add pear-Auth_SASL2 0.2.0 (copied from pear-Auth_SASL)

Provides code to generate responses to common SASL mechanisms, including:

• Digest-MD5
• Cram-MD5
• Plain
• Anonymous
• Login (Pseudo mechanism)
• SCRAM

WWW: https://pear.php.net/package/Auth_SASL2