WPMU DEV - WP Defender Pro 5.1.1

Improvement: Add plugin configuration import/export option for Hub
Improvement: HSTS Maximum age of Strict Transport Security header added 30 days, 2 years
Improvement: Update copy for MaxMind license key
Fix: Separate email subjects of templates for scan notifications
Fix: Warning open_basedir restriction in effect
Fix: 2FA required even if the role is unchecked
Fix: Preview for Lockout Custom Message doesn't work
Fix: Sending lockout emails even though they are disabled
Other minor enhancements and fixes

Fix: Audit Logging sometime triggers a fatal error on some setups.

Improvement: Frequency of Security Tweak notifications reduced to 7 days
Fix: GeoIP now compatible with new MaxMind policy
Fix: Mask login URL now allow URL with an extension
Fix: Lockout notification email now displays correct time unit
Fix: Get started screen appears only where required
Fix: Manage your email preferences & unsubscribe email link now works
Fix: Strict Transport Security Header now shows subdomain option on the root domain
Fix: On login lockout, Defender doesn't block IP permanently
Fix: Mask login won't block admin links from email
Other minor enhancements and fixes