Allow to build with the PyPI package "clang" instead of "libclang". 1. It seems to be maintained. 2. In the FreeBSD base system there is no pre-built libclang.so. If you need this library you have to install llvm from ports additionally. 2. On FreeBSD there is no pre-built wheel "libclang" with a packaged libclang.so.

Long: proxy-negotiate
Help: Use HTTP Negotiate (SPNEGO) authentication on the proxy
Added: 7.17.1
See-also: proxy-anyauth proxy-basic
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Tells curl to use HTTP Negotiate (SPNEGO) authentication when communicating
with the given proxy. Use --negotiate for enabling HTTP Negotiate (SPNEGO)
with a remote host.