This rebase fixes a single downstream report, RHEL-5822, corresponding to upstream report https://bugs.passt.top/show_bug.cgi?id=75, commit https://passt.top/passt/commit/?id=8b8537d30142a3d8b343cdd4e176a65ccdff1748, and a number of issues that were reported upstream, most importantly:

• pasta: Fix setting IPv4 addresses, report: https://github.com/containers/podman/pull/19699 commit: https://passt.top/passt/commit/?id=5e4f7b92b0b0bf4724c505fa95fcae1526a8f88b
• pasta: Fix setting routes together with -a / --address, reports: https://bugs.passt.top/show_bug.cgi?id=71 https://github.com/containers/podman/pull/19699#issuecomment-1688769287 commit: https://passt.top/passt/commit/?id=a7e4bfb857cb5d0e111ab74b6ace47eea15d2078
• passt: Fix TCP handshake with SMTP (or any protocol where clients wait for server data after handshake before proceeding), commit https://passt.top/passt/commit/?id=9178a9e3462d7fb931e4316d99eccbb3e7460cb7
• pasta: Periodic scan/rebind for UDP bound ports too, with -u auto, reports https://bugs.passt.top/show_bug.cgi?id=45 https://github.com/rootless-containers/rootlesskit/issues/383 https://passt.top/passt/commit/?id=457ff122e33cf6a6e559b073f41c530e42d9c597

Full list of corresponding upstream changes: https://passt.top/passt/log/?qt=range&q=2023_08_18.0af928e..2023_12_04.b86afe3

Other than upstream changes, we can now drop downstream (RHEL) spec file adaptations for SELinux file contexts, as Fedora's spec file includes equivalent of commit https://passt.top/passt/commit/?id=a405d0c026582375448fe87c6e440eb0fd428dd7.