[Bug 1993478] Re: package openssh-server 1:9.0p1-1ubuntu7 failed to install/upgrade: postinstall script returned 1

[msaxl]

slightly off-topic for those who find this before the 22.10 documentation:
https://discourse.ubuntu.com/t/sshd-now-uses-socket-based-activation-ubuntu-22-10-and-later/30189

This bug is about the postinst script not being able to convert (or
keep) every configuration around.

In my case this is because the script is unable to parse ListenAddress
with port. The script should understand this formats (quote from man
sshd_config):

ListenAddress hostname|address
ListenAddress hostname:port
ListenAddress IPv4_address:port
ListenAddress [hostname|address]:port

only the first is supported (and [hostname|address] without port)
example of working statements
ListenAddress localhost
ListenAddress 127.0.0.1
ListenAddress [::1]
ListenAddress ::1

example of valid but not working statements:
ListenAddress localhost:2222
ListenAddress 0.0.0.0:2222
ListenAddress [::]:2222

When converting [::] I think BindIPv6Only=yes should be used, but that's
another topic

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Title:
  package openssh-server 1:9.0p1-1ubuntu7 failed to install/upgrade:
  postinstall script returned 1

Status in openssh package in Ubuntu:
  Triaged

Bug description:
  update failed...

  ProblemType: Package
  DistroRelease: Ubuntu 22.10
  Package: openssh-server 1:9.0p1-1ubuntu7
  ProcVersionSignature: Ubuntu 5.15.0-48.54-generic 5.15.53
  Uname: Linux 5.15.0-48-generic x86_64
  NonfreeKernelModules: cpuid tcp_diag inet_diag tls authenc echainiv esp4 xfrm_user xfrm_algo sctp ip6_udp_tunnel udp_tunnel cfg80211 veth nft_chain_nat xt_REDIRECT nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 xt_tcpudp nft_counter xt_policy nft_compat nf_tables nfnetlink bridge stp llc nls_iso8859_1 hid_generic joydev crct10dif_pclmul crc32_pclmul ghash_clmulni_intel usbhid virtio_net net_failover hid failover i2c_piix4 pata_acpi qemu_fw_cfg floppy sch_fq_codel ipmi_devintf ipmi_msghandler msr ramoops reed_solomon pstore_blk efi_pstore pstore_zone ip_tables x_tables autofs4 btrfs blake2b_generic zstd_compress dm_crypt raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx libcrc32c xor raid6_pq raid1 raid0 multipath linear bochs drm_vram_helper drm_ttm_helper ttm drm_kms_helper syscopyarea aesni_intel sysfillrect sysimgblt input_leds fb_sys_fops cec crypto_simd rc_core psmouse cryptd drm serio_raw virtio_scsi mac_hid
  ApportVersion: 2.23.1-0ubuntu3
  Architecture: amd64
  CasperMD5CheckResult: unknown
  Date: Wed Oct 19 08:41:28 2022
  ErrorMessage: »installiertes post-installation-Skript des Paketes openssh-server«-Unterprozess gab den Fehlerwert 1 zurück
  InstallationDate: Installed on 2019-08-13 (1162 days ago)
  InstallationMedia: Ubuntu-Server 18.04.2 LTS "Bionic Beaver" - Release amd64 (20190210)
  Python3Details: /usr/bin/python3.10, Python 3.10.7, python3-minimal, 3.10.6-1
  PythonDetails: N/A
  RebootRequiredPkgs: Error: path contained symlinks.
  RelatedPackageVersions:
   dpkg 1.21.9ubuntu1
   apt  2.5.3
  SourcePackage: openssh
  Title: package openssh-server 1:9.0p1-1ubuntu7 failed to install/upgrade: »installiertes post-installation-Skript des Paketes openssh-server«-Unterprozess gab den Fehlerwert 1 zurück
  UpgradeStatus: Upgraded to kinetic on 2022-10-19 (0 days ago)

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