debug offset allocations by an int, giving a hard trap in early startup.
Change to using a size_t. Debug and fix by John Paul Adrian Glaubitz.
+JH/13 Bug 2845: Fix handling of tls_require_ciphers for OpenSSL when a value
+ with underbars is given. The write-protection of configuration introduced
+ in 4.95 trapped when normalisation was applied to an option not needing
+ expansion action.
+
Exim version 4.95
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