This task is to do some exploratory work to help determine the size of the PCRE2 upgrade project. As part of this work, we should:

• Document which PCRE calls currently exist in the server codebase
• Compare with the new PCRE2 API and determine how difficult it would be to change over
• Attempt to add PCRE2 as a server dependency and try to compile it.

The output of this ticket should be some guidance as to how many engineers and how long it would take to perform the full PCRE2 upgrade.