Prepare release notes for BIND 9.15.7
-
Add a GitLab merge request number to the "trust-anchors" release note and slightly rephrase its second half.
-
Replace tabs with spaces in doc/arm/notes-9.15.7.xml to retain consistency with other XML files containing release notes.
-
Move the "Security Fixes" section for BIND 9.15.6 higher up, for consistency with release notes for other versions.