Update and add new Zimbra Collaboration fingerprints

[mkienow-r7]

Description

Updates the existing Zimbra fingerprints (http_cookies.xml, imap_banners.xml, pop_banners.xml) and adds new Zimbra Collaboration fingerprints (favicons.xml, html_title.xml, x509_subjects.xml).

Motivation and Context

Improved coverage and updated vendor/product information.

How Has This Been Tested?

• bundle exec ./bin/recog_verify {filename}
• rake tests

Types of changes

• New feature (non-breaking change which adds functionality)

Checklist:

• [x] I have updated the documentation accordingly (or changes are not required).
• [x] I have added tests to cover my changes (or new tests are not required).
• [x] All new and existing tests passed.