gccint: Plugins description

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1 24.5 Giving information about a plugin
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1 A plugin should give some information to the user about itself.  This
1 uses the following structure:
1 
1      struct plugin_info
1      {
1        const char *version;
1        const char *help;
1      };
1 
1  Such a structure is passed as the 'user_data' by the plugin's init
1 routine using 'register_callback' with the 'PLUGIN_INFO' pseudo-event
1 and a null callback.
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