distrib: update Webmin version to 2.653 in Dockerfile

[rdmark]

bumping to the latest release version from the Webmin project

[augmentcode]

🤖 Augment PR Summary

Summary: Updates the Webmin module Docker build to use Webmin 2.653.

Changes: Bumps the pinned WEBMIN_VERSION and the webmin-setup-repo.sh source commit used during image build.

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[augmentcode]

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[rdmark]

@andylemin heads-up, I filed webmin/webmin#2803 with the upstream project to ask if they'd consider a longer retention period for historical deb packages

it is becoming a significant manual overhead to constantly keep up to date with the latest versions, so we may have to come up with a better scheme

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud

[github-actions]

📊 Performance Dashboard

Commit: 3d56ee4feef02841f6c28169d6ac95cced4c45de

🔥 Spectest (AFP 3.4) - FlameGraph

Netatalk Code-time: 1.4% · Runtime: 68s · Stacks: 1134

🔥 Click the preview to open the interactive flamegraph (zoom + search).

🔝 Top 10 leaf functions

Function	Samples
_raw_spin_unlock_irqrestore	345093455
do_syscall_64	116868710
__cp_end	91510405
srso_alias_safe_ret	45203935
afpd	38588725
x64_sys_call	33076050
__syscall_cp_c	30870980
file_close_fd	25358305
syscall_trace_enter	24255770
perf_syscall_enter	24255770

📈 Speedtest (AFP 3.4) - PerfGraph

🔝 Throughputs per operation

Operation	Peak mean (MB/s)	avg mean (MB/s)	avg max (MB/s)
Read	8420	5051	5546
Write	332	156	457
Copy	3332	1929	2086
ServerCopy	4163	1663	2267

⏱️ Lantest (AFP 3.4) - LatencyGraph

Avg total runtime: 7188 ms · Avg time per AFP op: 0.113 ms

🐢 All operations (avg runtime, in test order)

Test	Avg (ms)
Writing one large file	39
Reading one large file	15
Creating 2000 files	763
Open, write 1024 bytes, close 2000 files	436
Open, read 512 bytes, close 2000 files	395
Copying 2000 files client-side	1470
Copying 2000 files server-side	908
Stat 2000 files	375
Enumerate dir with 2000 files	5
Lock then unlock 2000 open forks	185
Deleting 2000 files	698
Byte-range lock/unlock 2000 ranges in one fork	186
Create directory tree with 1000 dirs	411
Directory cache hits (20 dirs x 100 files)	117
Mixed cache operations (create/stat/enum/delete) on 1000 files	723
Deep path traversal (20 levels x 100 walks)	125
Cache validation (2000 files x 3 lookups)	337