fix: block shared/reserved IP ranges in SSRF guard#47
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Adds Carrier-Grade NAT (100.64.0.0/10), benchmarking (198.18.0.0/15), and documentation/example (192.0.2.0/24, 198.51.100.0/24, 203.0.113.0/24) ranges to the isBlockedIP check. Go's net.IsPrivate() covers RFC1918 but not these shared/reserved ranges. Fixes profullstack#43
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Fixes #43
Adds shared/reserved IP ranges to isBlockedIP:
Go's net.IsPrivate() covers RFC1918 but not these ranges.