[MacPorts] #73978: port patch with os.major=X should not care about a "platform mismatch"

[MacPorts]

#73978: port patch with os.major=X should not care about a "platform mismatch"
------------------------+--------------------
 Reporter:  reneeotten  |      Owner:  (none)
     Type:  defect      |     Status:  new
 Priority:  Normal      |  Milestone:
Component:  base        |    Version:  2.12.5
 Keywords:              |       Port:
------------------------+--------------------
 One used to be able to specify `os.major=X` together with `port patch` to
 simulate building on an older OS in order to check whether OS-version-
 specific patches still apply.
 Currently that no longer works; instead it shows:
 ```
 DEBUG: platform mismatch ... upgrading!
 ```

 and wants to rebuild all dependents for the older OS first.

 Is this an intentional change? If possible can this be reverted please?


 [similarly, but I can open an new ticket for this: there should be no
 obvious reason why `port extract` needs to wait for a registry lock]

-- 
Ticket URL: <https://trac.macports.org/ticket/73978>
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