merge stable

[MartinNowak]

• Issue 19842 - only class member functions must be used be used as slots
• Fix Issue 22125 - std.process.Config was changed to a struct but miss operator overloads

[dlang-bot]

Thanks for your pull request, @MartinNowak!

Bugzilla references

Auto-close	Bugzilla	Severity	Description
✗	19842	critical	std.signals Segfault when connecting with a lambda
✓	22125	regression	std.process.Config was changed to a struct but miss operator overloads, leading to user code breakage.

Testing this PR locally

If you don't have a local development environment setup, you can use Digger to test this PR:

dub run digger -- build "master + phobos#8172"