title: Brew doctor - "warning: unbrewed header files were found in /usr/local/include"?
body: <p>When I run <code>brew doctor</code>, the following error is thrown</p>
  
  <pre><code>Warning: Unbrewed header files were found in /usr/local/include.
  If you didn't put them there on purpose they could cause problems when
  building Homebrew formulae, and may need to be deleted.
  
  Unexpected header files:
      /usr/local/include/curl/curl.h
      /usr/local/include/curl/curlbuild.h
      /usr/local/include/curl/curlrules.h
      /usr/local/include/curl/curlver.h
      /usr/local/include/curl/easy.h
      /usr/local/include/curl/mprintf.h
      /usr/local/include/curl/multi.h
      /usr/local/include/curl/stdcheaders.h
      /usr/local/include/curl/typecheck-gcc.h
      /usr/local/include/node/ares.h
      /usr/local/include/node/ares_version.h
      /usr/local/include/node/nameser.h
      /usr/local/include/node/node.h
      /usr/local/include/node/node_buffer.h
      /usr/local/include/node/node_internals.h
      /usr/local/include/node/node_object_wrap.h
      /usr/local/include/node/node_version.h
      /usr/local/include/node/openssl/opensslconf.h
      /usr/local/include/node/uv-private/ngx-queue.h
      /usr/local/include/node/uv-private/stdint-msvc2008.h
      /usr/local/include/node/uv-private/tree.h
      /usr/local/include/node/uv-private/uv-bsd.h
      /usr/local/include/node/uv-private/uv-darwin.h
      /usr/local/include/node/uv-private/uv-linux.h
      /usr/local/include/node/uv-private/uv-sunos.h
      /usr/local/include/node/uv-private/uv-unix.h
      /usr/local/include/node/uv-private/uv-win.h
      /usr/local/include/node/uv.h
      /usr/local/include/node/v8-debug.h
      /usr/local/include/node/v8-preparser.h
      /usr/local/include/node/v8-profiler.h
      /usr/local/include/node/v8-testing.h
      /usr/local/include/node/v8.h
      /usr/local/include/node/v8stdint.h
      /usr/local/include/node/zconf.h
      /usr/local/include/node/zlib.h
  </code></pre>
  
  <p>Would it be safe to delete these files? What is the optimal way to resolve this warning?‏‏‏‏‏‏</p>