Murl is a "minimal" Curl emulator.  Because Curl has a significant number
of dependencies on other libraries, it's difficult to cross-compile for
non-Linux platforms.  While Curl can be compiled, some of the dependencies
it uses can be challenging to compile for targets such as Android. 

Murl was developed to provide minimal HTTPS support to be used by libacvp.
This is experimental code for libacvp users that don't want to use Curl.
The only dependency used by Murl is OpenSSL 1.0.2, which is used for 
TLS support.  Only HTTP GET and POST operations are supported.  

The following Curl functions are implemented, but not necessarily fully 
compliant with Curl.  Specifically, HTTPS is the only supported protocol.  
Many of the Curl options used with curl_easy_setopt() are not supported.

    curl_easy_init()
    curl_easy_perform()
    curl_easy_cleanup()
    curl_easy_getinfo()
    curl_global_cleanup()
    curl_slist_append()
    curl_slist_free_all()
    curl_easy_strerror();
    curl_easy_setopt()

The following Curl options are supported in some capacity:

    CURLOPT_USERAGENT
    CURLOPT_URL
    CURLOPT_POSTFIELDS
    CURLOPT_POSTFIELDSIZE_LARGE
    CURLOPT_CAINFO
    CURLOPT_SSL_VERIFYPEER
    CURLOPT_SSLCERT
    CURLOPT_SSLCERTTYPE
    CURLOPT_SSLKEY
    CURLOPT_SSLKEYTYPE
    CURLOPT_WRITEDATA
    CURLOPT_WRITEFUNCTION


Limitations:
    * Murl is not thread-safe.  It should only be used by a single-threaded
      process.
    * Murl only provides HTTPS support for GET and POST.  Any other
      protocol or HTTP method will fail.


Murl CLI:
    A sample program is provided to show how to use Murl.  After doing 'make',
    the following example shows how to run the sample program.

    ./murl ../certs/mozzila_trust_anchors.pem https://www.cisco.com/