curl: Unsanitized IPFS CID Allows SSRF Against Configured Gateway

Summary: ipfsurlrewrite in src/toolipfs.c decodes the host component CID of ipfs:// / ipns:// URLs using CURLUURLDECODE and then concatenates that decoded value directly into the gateway path aprintf"%s%s/%s%s", ... without normalization or validation. A crafted host value for example...