• A ports freeze is not a ports lock for tagging, so it takes a bit more than "an hour or two".
• The explenation of what needs approval and what not, during a freeze was ambiguous, so clarify that all patches need approval during a freeze.

While here:

• Add some links to the Portmgr Quality Assurance page.
• Use "the ports management team" instead of "the ports manager" as we're more than one person and have been for quite a while.

Reviewed by: marcus, krion
Approved by: remko