Update DH group exchange configuration documentation to reflect the use of a property to govern fallback mode
@@ -105,3 +105,5 @@ In any case, the values are auto-detected by the code but the user can intervene
* The minimum must be less or equal to the maximum (enforced - if reversed then group exchange is **disabled**)
* If a **negative** value is set in either one then group exchange is **disabled**
* Setting a value of zero indicates a **lazy** auto-detection of the supported range the next time these values are needed.
+
+Furthermore, if all possible primes have been exhausted the code no longer falls back to DH group exchange using SHA-1 unless the `ALLOW_DHG1_KEX_FALLBACK` core module property is set.
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