Add underflow and overflow detection

[pacampbell]

Enabled the build flag which detects underflow and overflow by default. Marked certain functions as unchecked in the networking library as they are depending on this behavior for certain operations.

Checklist:

• [x] The project compiles
• [x] The PR targets develop branch

[pacampbell]

Didn't add it to the database project. Seems that we store a bunch of values as negative but treat them as unsigned. The checked context doesn't seem to like that.