Bugfixes

• #1550 - Disable the order cache (introduced in version 2.1.6) because it could allow certificates to be installed without their private key in certain conditions, thanks @KevinMei-Github for the report! The order cache is non-essential feature designed to prevent users from hitting rate limits while testing or debugging. We will evaluate over the coming weeks whether to redesign or remove it.
• #1558 - Fix edge case in DNS CNAME resolution where multiple hosts are valid to create TXT records, thanks @mohamed-shehata-m for the report!
• #1509 - Improved reliabilty of creating new bindings in IIS, thanks @stevenbarker for the stack trace that led to this fix.