HTTPS
=====

OkHttp attempts to balance two competing concerns:

 * **Connectivity** to as many hosts as possible. That includes advanced hosts that run the latest versions of [boringssl](https://boringssl.googlesource.com/boringssl/) and less out of date hosts running older versions of [OpenSSL](https://www.openssl.org/).

def set_system_libs_flag(environ_cp):
  """Set system libs flags."""
  syslibs = environ_cp.get('TF_SYSTEM_LIBS', '')

  if is_s390x() and 'boringssl' not in syslibs:
    syslibs = 'boringssl' + (', ' + syslibs if syslibs else '')

  if syslibs:
    if ',' in syslibs:
      syslibs = ','.join(sorted(syslibs.split(',')))
    else: