doc: add gate class to fiber module
doc: add gate class to fiber module

dreamsxin/seastar,guiquanz/scylla,bowlofstew/scylla,glommer/scylla,norcimo5/seastar,flashbuckets/seastar,rluta/scylla,linearregression/seastar,rluta/scylla,shyamalschandra/seastar,kjniemi/scylla,bzero/seastar,wildinto/seastar,dwdm/scylla,koolhazz/seastar,chunshengster/seastar,bzero/seastar,xtao/seastar,kangkot/scylla,wildinto/seastar,linearregression/seastar,raphaelsc/scylla,victorbriz/scylla,respu/scylla,leejir/seastar,syuu1228/seastar,shaunstanislaus/scylla,phonkee/scylla,acbellini/scylla,gwicke/scylla,tempbottle/scylla,scylladb/scylla,tempbottle/seastar,aruanruan/scylla,joerg84/seastar,linearregression/scylla,duarten/scylla,dwdm/seastar,justintung/scylla,avikivity/seastar,hongliangzhao/seastar,kangkot/scylla,glommer/scylla,xtao/seastar,sjperkins/seastar,justintung/scylla,capturePointer/scylla,dreamsxin/seastar,flashbuckets/seastar,wildinto/scylla,shaunstanislaus/scylla,rentongzhang/scylla,dwdm/seastar,gwicke/scylla,syuu1228/seastar,aruanruan/scylla,dwdm/seastar,sjperkins/seastar,kjniemi/scylla,norcimo5/seastar,acbellini/scylla,tempbottle/seastar,printedheart/seastar,mixja/seastar,tempbottle/seastar,duarten/scylla,avikivity/seastar,anzihenry/seastar,raphaelsc/scylla,kjniemi/scylla,respu/scylla,capturePointer/scylla,asias/scylla,capturePointer/scylla,printedheart/seastar,linearregression/scylla,anzihenry/seastar,avikivity/scylla,hongliangzhao/seastar,joerg84/seastar,scylladb/scylla,respu/scylla,dwdm/scylla,joerg84/seastar,scylladb/scylla-seastar,asias/scylla,scylladb/scylla-seastar,bowlofstew/scylla,norcimo5/seastar,bzero/seastar,glommer/scylla,dwdm/scylla,rluta/scylla,printedheart/seastar,bowlofstew/seastar,acbellini/seastar,scylladb/scylla,stamhe/seastar,avikivity/scylla,jonathanleang/seastar,linearregression/seastar,rentongzhang/scylla,tempbottle/scylla,kangkot/scylla,kjniemi/seastar,senseb/scylla,kjniemi/seastar,eklitzke/scylla,stamhe/seastar,bowlofstew/scylla,guiquanz/scylla,chunshengster/seastar,xtao/seastar,acbellini/seastar,leejir/seastar,dreamsxin/seastar,syuu1228/seastar,bowlofstew/seastar,duarten/scylla,scylladb/seastar,stamhe/seastar,koolhazz/seastar,shyamalschandra/seastar,victorbriz/scylla,stamhe/scylla,cloudius-systems/seastar,phonkee/scylla,acbellini/seastar,flashbuckets/seastar,victorbriz/scylla,mixja/seastar,koolhazz/seastar,wildinto/scylla,scylladb/seastar,shyamalschandra/seastar,chunshengster/seastar,acbellini/scylla,sjperkins/seastar,mixja/seastar,gwicke/scylla,scylladb/scylla,stamhe/scylla,cloudius-systems/seastar,hongliangzhao/seastar,guiquanz/scylla,kjniemi/seastar,avikivity/seastar,asias/scylla,jonathanleang/seastar,senseb/scylla,tempbottle/scylla,justintung/scylla,senseb/scylla,rentongzhang/scylla,aruanruan/scylla,scylladb/seastar,stamhe/scylla,wildinto/scylla,jonathanleang/seastar,wildinto/seastar,eklitzke/scylla,scylladb/scylla-seastar,bowlofstew/seastar,anzihenry/seastar,phonkee/scylla,eklitzke/scylla,shaunstanislaus/scylla,avikivity/scylla,leejir/seastar,linearregression/scylla,cloudius-systems/seastar,raphaelsc/scylla