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    $ua->env_proxy;

Load proxy settings from C<*_proxy> environment variables.  You might
specify proxies like this (sh-syntax):

  gopher_proxy=http://proxy.example.org/
  wais_proxy=http://proxy.example.org/
  no_proxy="localhost,example.com"
  export gopher_proxy wais_proxy no_proxy

csh or tcsh users should use the C<setenv> command to define these
environment variables.

On systems with case insensitive environment variables there exists a
name clash between the CGI environment variables and the C<HTTP_PROXY>
environment variable normally picked up by C<env_proxy>.  Because of
this C<HTTP_PROXY> is not honored for CGI scripts.  The
C<CGI_HTTP_PROXY> environment variable can be used instead.

=head2 no_proxy