isync/LICENSES/LicenseRef-isync-GPL-exception.txt

SPDX-Exception-Identifier: LicenseRef-isync-GPL-exception
SPDX-Licenses: GPL-2.0-or-later
Usage-Guide:
  This exception is used together with the above SPDX-License to
  allow linking the compiled version of code to non GPL compliant code.
  To use this exception add it with the keyword WITH to one of the
  identifiers in the SPDX-Licenses tag:
    SPDX-License-Identifier: <SPDX-License> WITH LicenseRef-isync-GPL-exception
License-Text:

As a special exception, mbsync may be linked with the OpenSSL library,
despite that library's more restrictive license.