Merge branch 'es/oss-fuzz'

Backport oss-fuzz tests for us to our codebase. * es/oss-fuzz: fuzz: port fuzz-url-decode-mem from OSS-Fuzz fuzz: port fuzz-parse-attr-line from OSS-Fuzz fuzz: port fuzz-credential-from-url-gently from OSS-Fuzz