[MacPorts] #55767: Please add gnurl to macports

[MacPorts]

#55767: Please add gnurl to macports
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 Reporter:  gnw3     |      Owner:
     Type:  request  |     Status:  new
 Priority:  Normal   |  Milestone:
Component:  ports    |    Version:
 Keywords:           |       Port:  gnurl
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 [http://lists.gnu.org/archive/html/info-gnu/2018-01/msg00009.html]

 From  the README file

 libgnurl is a fork of libcurl with the following major changes:

 Compilation requirements:
 * libgnurl must be compiled so that it supports only HTTP and HTTPS
 (remove Gopher, SSH, IMAP, etc.)
 * libgnurl must be compiled so that it supports only GnuTLS (remove
 CaySSL, QsoSSL, GSKit, etc.)
 * removed support for NTLM, GSSAPI, SPNEGO, LDAP, metalink, HTTP2
 * We recommend to build GnuTLS with DANE support, provided by 'unbound'.
 This is optional.

 The goal of the cURL project is clearly to support many crypto
 backends and many protocols. That is a worthy goal, and I wish them
 luck with it. The goal for libgnurl is to support only HTTP and HTTPS
 (and only HTTP 1.x) with a single crypto backend (GnuTLS) to ensure a
 small footprint and uniform experience for developers regardless of
 how libcurl was compiled.

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Ticket URL: <https://trac.macports.org/ticket/55767>
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