jesopo/isupport_listmodes.md

## isupport_listmodes.md

      
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              isupport_listmodes.md
            
          
    ISUPPORT LISTMODES token

rationale

servers currently do not convey which RPL_*LIST and RPL_ENDOF*LIST numerics are used for custom list modes (e.g. +eIq.)
however, well established "custom" list modes can be roughly figured out doing the following:
+q

728/729 have a parameter that expresses the list mode that represents quiets:
> MODE ##test2 +q
< :adams.freenode.net 728 jes|test ##test2 q asd!*@* jes|test!jess@jesopo.uk 1579799870
< :adams.freenode.net 729 jes|test ##test2 q :End of Channel Quiet List

+e

the EXCEPTS ISUPPORT token expresses the mode used for 348 and 349.
+I

the INVEX ISUPPORT token expresses the mode used for 346 and 347
other list modes

less well established list modes, while providing numerics for listing their entries, do not have methods like this to tie the two together.
solution

LISTMODES=<mode>:<num-list>:<num-end>,<mode2>:<num-list2>:<num-end2>

e.g.:
LISTMODES=q:728:729,e:348:349,I:346:347,X:954:953
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