Expand tests of resource resolution

[bcsgh]

Add some more test for resource resolution.

This includes

• a test exposing a bug: [BUG] URL's that exactly match a registried regex pattern dispatch to that registered resource #308
• some tests of some of the corners relating to another PR: Consider family_url in ordering of http_endpoint. #306

[bcsgh]

After a bit more digging, I think these are actually backwards. And both in fact end up returning false.

tl;dr: http_endpoint::operator < is unconditionally case-insensitive:

libhttpserver/src/details/http_endpoint.cpp

Lines 144 to 146 in 6d1df06

	bool http_endpoint::operator <(const http_endpoint& b) const {
	COMPARATOR(url_normalized, b.url_normalized, std::toupper);
	}

That's going to be a pain to fix as it's something users could be inadvertently depending on.