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--resolve doesn't work with IPv6 addresses in bracket notation #2087

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@demonbane

Description

@demonbane

I did this (host/ip are intentionally obfuscated)

curl -v --resolve 'myhost.domain.com:443:[dead:beef:1234:5678:8765:4321:feed:daed]' https://myhost.domain.com

I expected the following

For myhost.domain.com to resolve to [dead:beef:1234:5678:8765:4321:feed:daed], but what I got was:

curl -v --resolve 'myhost.domain.com:443:dead:beef:1234:5678:8765:4321:feeb:daed' https://myhost.domain.com
* Address in 'myhost.domain.com:443:[dead:beef:1234:5678:8765:4321:feed:daed]' found illegal!

If I specify the IPv6 address incorrectly, that is without the brackets, then it works as expected:

curl -v --resolve 'myhost.domain.com:443:dead:beef:1234:5678:8765:4321:feeb:daed' https://myhost.domain.com
* Added myhost.domain.com:443:dead:beef:1234:5678:8765:4321:feeb:daed to DNS cache
* Rebuilt URL to: https://myhost.domain.com/
* Hostname myhost.domain.com was found in DNS cache
*   Trying dead:beef:1234:5678:8765:4321:feeb:daed...

curl/libcurl version

curl 7.55.1 (x86_64-pc-linux-gnu) libcurl/7.55.1 OpenSSL/1.0.2g zlib/1.2.11 libidn2/2.0.2 libpsl/0.18.0 (+libidn2/2.0.2) librtmp/2.3
Release-Date: 2017-08-14
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtmp rtsp smb smbs smtp smtps telnet tftp 
Features: AsynchDNS IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz TLS-SRP UnixSockets HTTPS-proxy PSL

operating system

$ lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description:    Ubuntu 17.10
Release:        17.10
Codename:       artful

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