Adds client IP address to search logs.

[clanofartisans]

I affirm:

• [x] I understand that if I do not agree to the following points by completing the checkboxes my PR will be ignored.
• [x] I understand I should leave resolving conversations to the LandSandBoat team so that reviewers won't miss what was said.
• [x] I have read and understood the Contributing Guide and the Code of Conduct.
• [x] I have tested my code and the things my code has changed since the last commit in the PR and will test after any later commits.

What does this pull request do?

Adds the client's IP address to search-server log. We've been wanting to see if someone has been scraping the search server directly and this should help us track it down.

Steps to test these changes

Do some searching (e.g. look at some random AH history) and check logs for IP.