neon: specify a certificate file

Using tools like cadaver, custom certs can’t be added unless a cert
file is specified.  This allows cadaver (and presumably others) to get
around self-signed certificate issues.

Closes Homebrew/homebrew#26724.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

Formula/neon.rb

@@ -28,6 +28,7 @@ class Neon < Formula
       "--prefix=#{prefix}",
       "--enable-shared",
       "--disable-static",
+      "--with-ca-bundle=/usr/share/curl/curl-ca-bundle.crt",
       "--disable-nls",
       "--with-ssl",
     ]