Clendenin opened a new pull request, #13077:
URL: https://github.com/apache/trafficserver/pull/13077
## Summary
The `IPV6_CIDR` lexer fragment in the HRW4U grammar rejected values
1-32, reserving them exclusively for `IPV4_CIDR`. This caused valid
IPv6 prefixes like `2620:149:a00::/32` to fail with a lexer error.
The restriction was unnecessary because `IPV4_LITERAL` and
`IPV6_LITERAL` are already unambiguous at the lexer level: IPv4
requires dots, IPv6 requires colons. The CIDR fragments are consumed
inside these parent token rules, so they never compete. This was
verified by tokenizing overlapping CIDR values through the generated
ANTLR lexer.
The fix expands `IPV6_CIDR` from 33-128 to 1-128.
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