Support for SSL
                                                   (2000/11/07) Katsunari Okabe
                                                        okabek@guitar.ocn.ne.jp
                                                   (2001/12/27)  Fumitoshi Ukai
                                                              ukai@debian.or.jp


* Install the OpenSSL Library before building w3m
   to provide SSL support.

* The configure script can automatically detect if the
   OpenSSL Library has been installed. If the script does
   not run, confirm the USE_SSL macro has been defined in
   config.h. Furthermore, if you want to enable SSL support
   confirm that the USE_SSL_VERIFY macro has been defined as well.
   If the compiler throws an error, confirm the `-lssl -lcrypto`
   linker flags are set, as well as the '-I(SSLeay/OpenSSL
   header directory)` flag.

   SSL Support can be validated from the "SSL Settings" section
   of the Option Setting Panel.

 * The following settings are available for SSL:

   ssl_forbid_method
       List of methods you can forbid (2: SSLv2: 3: SSLv3, t: TLSv1.0,
       5: TLSv1.1, 6: TLSv1.2, 7: TLSv1.3)
       (default is 2, 3, t, 5)
   ssl_min_version
       Lowest SSL Version, OpenSSL 1.1 and later, options are: (all,
       TLSv1.0, TLSv1.1, TLSv1.2, TLSv1.3) (default is not set)
   ssl_cipher
       Prior to TLSv1.2 the SSL cipher (example: DEFAULT:@SECLEVEL=2)
       (default for OpenSSL 1.1 and later is not set.
       Otherwise DEFAULT:!LOW:!RC4:!EXP).
   ssl_verify_server ON/OFF
       Verify the SSL server (default: ON)
   ssl_cert_file filename
       SSL client PEM certificate (default is not set)
   ssl_key_file
       SSL client PEM secret key (default is not set)
   ssl_ca_path directory
       SSL CA PEM certificate directory (default is not set)
   ssl_ca_file filename
       SSL CA PEM certificate filename (default is not set,
       set when you run the configure script)
   ssl_ca_default ON/OFF
       Use the standard location for the SSL CA PEM certificate file
       (default ON)

 * If your environment uses the EGD (Entropy Gathering Daemon),
   please check the USE_EGD macro.