- Python patching: tune some logging all-around
- Python patching: *FINALLY* set the dates on the patched files to `max(patch_date, root_makefile_date)` thus making lighting-fast rebuilds again
- new EXTRAWIFI patch generator harness; Python patching EXTRA_PATCH_FILES_FIRST
- Python patching: use temp file for patching rejects; clean it up
- new EXTRAWIFI patch generator harness; Python: mark drivers as autogen, don't split or parse them, read as bytes, apply bytes directly
- new EXTRAWIFI patch generator harness; somewhat-works, but patches are per-family
- Python patching: add the `cache/patch` as a mountpoint
- Darwin Docker performance is 20x with namedvolume; the cached patches are very large
- share a single `.git` for all u-boots
- all fetches are done against it, maximizing cache hit ratio drastically
- also reduces the size of each working copy by more than 70%
- split uboot's git stuff into uboot-git.sh
- split `uboot_prepare_git()` from `compile_uboot()`
- now we've a single `.git` for all kernels with all branches; a "master" cache
- back to full stable git bundle usage from kernel.org
- bye bye, "gitballs"
- split kernel-related git stuff into `kernel-git.sh`
- introduce `ARMBIAN_MOUNTPOINTS_DEPRECATED` @TODO actually use for cleaning non-Docker
- add `axel` hostdep for multi-conn download of bundle, which comes from a CDN.
- deprecate old mountpoints for gitballs and linux-kernel
- move cleaning of old sources/kernel to mountpoints code
- introduce `SHOW_CCACHE=yes` for detailed ccache statistics and logging
- fix: kernel build is done under "env -i", so pass CCACHE_DIR down to Make if CCACHE_DIR is set...
- split from kernel.sh, show stats also for u-boot targets; show compile time
- add volume definition (under `${SRC}/cache/ccache`); auto-use that in Docker builds via `CCACHE_DIR`
- better logging for `do_with_ccache_statistics()`
- there's some CCACHE_DIR code from before; unify @TODO
