lib/ur: Normalise contract between syncthing and ursrv (#6770)

* Fix ui, hide report date

* Undo Goland madness

* UR now web scale

* Fix migration

* Fix marshaling, force tick on start

* Fix tests

* Darwin build

* Split "all" build target, add package name as a tag

* Remove pq and sql dep from syncthing, split build targets

* Empty line

* Revert "Empty line"

This reverts commit f74af2b067.

* Revert "Remove pq and sql dep from syncthing, split build targets"

This reverts commit 8fc295ad00.

* Revert "Split "all" build target, add package name as a tag"

This reverts commit f4dc889951.

* Normalise contract types

* Fix build add more logging

lib/ur/memsize_darwin.go

@@ -8,7 +8,10 @@ package ur
 
 import "golang.org/x/sys/unix"
 
-func memorySize() (int64, error) {
+func memorySize() int64 {
 	mem, err := unix.SysctlUint64("hw.memsize")
-	return int64(mem), err
+	if err != nil {
+		return 0
+	}
+	return int64(mem)
 }