title: Enable GSS-Negotiate with curl
body: <p>I have the following issue.</p>
  
  <p>OS: CentOS 6.6</p>
  
  <p>PHP: 5.5</p>
  
  <p>Curl: 7.43 compiled</p>
  
  <p>When I execute "curl -V" I get the following:</p>
  
  <pre><code>curl 7.43.0 (x86_64-unknown-linux-gnu) libcurl/7.43.0 OpenSSL/1.0.1e zlib/1.2.3 libidn/1.18 libssh2/1.0 nghttp2/1.2.1-DEV
  Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smb smbs smtp smtps telnet tftp 
  Features: Debug TrackMemory IDN IPv6 Largefile GSS-API Kerberos SPNEGO NTLM NTLM_WB SSL libz HTTP2 UnixSockets
  </code></pre>
  
  <p>What I need is curl to support "GSS-Negotiation" but no matter what I try it does not shows up in the features list.</p>
  
  <p>What am I doing wrong?</p>
  
  <p>For example on another server with CentOS 6.4 it is running correctly:
  Curl -V</p>
  
  <pre><code>curl 7.19.7 (x86_64-redhat-linux-gnu) libcurl/7.19.7 NSS/3.14.0.0 zlib/1.2.3 libidn/1.18 libssh2/1.4.2
  Protocols: tftp ftp telnet dict ldap ldaps http file https ftps scp sftp 
  Features: GSS-Negotiate IDN IPv6 Largefile NTLM SSL libz
  </code></pre>
  
  <p>I am using SSO for my project and the idea is to send the credentials to an API.</p>