Bug: srv doesn't respect --local-host not being set

Describe the bug

Running a server on 1234.

srv -h localhost -p 1234 --bind-local-port --local-port 1235
SHOUT|2024-05-08 10:56:14.019751| srv.main |Unhandled exception type 'Null' is not a subtype of type 'String'; stackTrace follows
#0      main.<anonymous closure> (file:///Users/runner/work/noports/noports/packages/dart/sshnoports/bin/srv.dart:92)
#1      _rootRun (dart:async/zone.dart:1399)
#2      _CustomZone.run (dart:async/zone.dart:1301)
#3      _runZoned (dart:async/zone.dart:1804)
#4      runZonedGuarded (dart:async/zone.dart:1792)
#5      main (file:///Users/runner/work/noports/noports/packages/dart/sshnoports/bin/srv.dart:78)
#6      _delayEntrypointInvocation.<anonymous closure> (dart:isolate-patch/isolate_patch.dart:295)
#7      _RawReceivePort._handleMessage (dart:isolate-patch/isolate_patch.dart:184)

SHOUT|2024-05-08 10:56:14.019940| srv.main |Exception running srv : type 'Null' is not a subtype of type 'String'

srv -h localhost -p 1234 --bind-local-port --local-port 1235 --local-host localhost
INFO|2024-05-08 10:56:24.815862| SrvImplDart |New SrvImplDart - localPort 1235
rv started successfully

Steps to reproduce

First I '...'
Then I '...'
And then '...'

Expected behavior

--local-host either is required or defaults to "localhost" properly. I already tested this behaviour in the C srv, so we are good there, but broke the dart one in my testing.

Screenshots

No response

Smartphones

Device: [e.g. iPhone6]
OS: [e.g. iOS8.1]
Browser [e.g. stock browser, safari]
Version [e.g. 22]

Were you using an atApplication when the bug was found?

No response

Additional context

srv d5.2.0

atsign-foundation / noports

Bug: srv doesn't respect --local-host not being set #1041