curl: stop interpreting IPv6 literals as glob patterns.
This makes it possible to fetch from an IPv6 literal without specifying the -g option. Globbing remains available elsehwere in the URL. For example: curl http://[::1]/file[1-3].txt This creates no ambiguity, because there is no overlap between the syntax of valid globs and valid IPv6 literals. Globs contain hyphens and at most 1 colon, while IPv6 literals have no hyphens, and at least 2 colons. The peek_ipv6() parser simply whitelists a set of characters and counts colons, because the real validation happens later on. The character set includes A-Z, in case someone decides to implement support for scopes like [fe80::1%25eth0] in the future. Signed-off-by: Paul Marks <pmarks@google.com>
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