Log Message:
Update pear-Auth_SASL to 1.0.6.
PR 46533 by Wen Heping.
While here, set LICENSE.

1.0.6 Changelog:

QA release
* Bug #18856: Authentication warnings because of wrong Auth_SASL::factory
  argument [kguest]

1.0.5 Changelog:

QA release
* Added basic support for any mechanism of the SCRAM family; with thanks to
  Jehan Pages. [kguest]
* crammd5 and digestmd5 mechanisms name deprecated in favour of IANA registered
  names 'cram-md5' and 'digest-md5'; with thanks to Jehan Pages. [kguest]