Allow long server names

[ciarams87]

Proposed changes

This commit increases the default server_names_hash_bucket_size to 256 and server_names_hash_max_size to 1024 to support hostnames longer than 47 characters.

Tested locally using the hostname abcdefghijklmn.too.long.server.name.example.org. Verified before the change, we get the error could not build server_names_hash, you should increase server_names_hash_bucket_size: 64, and after the change, there are no errors using this hostname.

Closes #632

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING doc
• I have added tests that prove my fix is effective or that my feature works
• I have checked that all unit tests pass after adding my changes
• I have updated necessary documentation
• I have rebased my branch onto main
• I will ensure my PR is targeting the main branch and pulling from my branch from my own fork

[kate-osborn]

LGTM!

This echo command is getting long. We should prioritize the FIXME on line 98. cc @pleshakov

[sjberman]

This echo command is getting long. We should prioritize the FIXME on line 98

I was actually looking at maybe cleaning this up for focus day.