posix: fix file_desc::map() flags parameter name
posix: fix file_desc::map() flags parameter name

It's actually protection, not flags, so change to align with the syscall
to avoid confusion.

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