Automatic update for kexec-tools-2.0.20-14.eln103.

Changelog

* Wed Jul  1 2020 Kairui Song <kasong@redhat.com> - 2.0.20-14
- s390x: enable the kexec file load by default
- x86_64: enable the kexec file load by default
- Revert "s390x: add kdump sysconfig option to use the kexec_file_load() syscall"
- Revert "kdump-lib: switch to the kexec_file_load() syscall on x86_64 by default"
- kdump.conf: fix a grammar issue
- man: improve description about /etc/kdump/{pre.d,post.d}interface
- mkdumprd: Improve the error message for umounted dump target
- mkdumprd: Fix nfs detection in to_mount
- Always wrap up call to dracut get_persistent_dev function
- s390x: add kdump sysconfig option to use the kexec_file_load() syscall
- mkdumprd: Fix dracut error on multiple extra_modules
- Fix kdump failure when mount target specified by dracut_args
- kdump.conf: Specify /etc/kdump/{pre.d,post.d}interface
- dracut-kdump.sh: Execute the binary and script filesin /etc/kdump/{pre.d,post.d}
- kdumpctl: Check the update of the binary and script files in /etc/kdump/{pre.d,post.d}
- dracut-module-setup.sh: Install files under /etc/kdump/{pre.d,post.d} into kdump initramfs
- Drop switch root capability for non fadump initramfs
- fadump: update fadump-howto.txt with some more troubleshooting help
- fadump-howto.txt: source it in spec file
- Don't inherit swiotlb parameter form 1st kernel by default
- module-setup.sh: Add "rd.neednet" parameter if network is needed
- Revert "Add a hook to wait for kdump target in initqueue"
- kdump.sysconfig: Remove the option 'log_buf_len' from kdump command line