Ctrl+U "update data" sends too-large overpass query
This bug applies when JOSM is configured to use overpass for updates.
When using "Ctrl+U" on a large data set, JOSM can send a request that's larger than overpass's max input size. By default, overpass is limited to a max input size of 16MB. Therefore,
Ctrl+U updates that target overpass should break up the request into chunks such that each chunk is less than 16MB.