Phillip Webb c0f8b90d31 Return getLastModified result from JarUrlConnection
Update `JarUrlConnection` and `NestedUrlConnection` so that calls
to `getLastModified()` and `getHeaderFieldDate("last-modified", 0)`
always return a result.

Fixes gh-38204
2023-11-04 19:43:54 -07:00
..
2023-10-11 15:06:09 +01:00