Redo code cleanup (#429)

* Code cleanup of routes config loader and API server (#424)

(cherry picked from commit 1ee3eb4de3)

* Refactored server setup and run out of main (#425)

(cherry picked from commit 05c57c3b85)

* Code cleanup in and around connector (#427)

(cherry picked from commit b3e88db48c)

* Update away from deprecated k8s NewInformer

* Tidy up couple of k8s docs examples

server/client_filter.go

@@ -89,7 +89,7 @@ func NewClientFilter(allows []string, denies []string) (*ClientFilter, error) {
 	}, nil
 }
 
-// Allow determines if the given address is allowed by this filter
+// Allow determines if this filter allows the given address
 // where addrStr is a netip.ParseAddr allowed address
 func (f *ClientFilter) Allow(addrPort netip.AddrPort) bool {
 	if !f.allow.Empty() {