Merge: synchronize up to mcu-tools/mcuboot/commit/caa1f6bb

Merged by GH web UI, PR #66

synchronization up to https://github.com/mcu-tools/mcuboot/commit/05143ce2361829c4f05e036bdb9177676f9bb297



- Fixed serial recovery skipping on nrf5340
- Fixed issue which caused that progressive's erase feature was off although
was selected by Kconfig (introduced by #42c985ce)
- Added check of reset address in incoming image validation phase, see `CONFIG_MCUBOOT_VERIFY_IMG_ADDRESS`
- Allow image header bigger than 1 KB for encrypted images
- Fixed build with image encryption using RSA (issue introduced by migration to mbedTLS 3.0.0)
- stm32: watchdog support
- many documentation improvements

Signed-off-by: Andrzej Puzdrowski <andrzej.puzdrowski@nordicsemi.no>