issue/posting: Allow nonmember to comment.
issue/posting: Allow nonmember to comment.

This fixes #307.

violetag/demo,doortts/fork-yobi,ahb0327/yobi,oolso/yobi,ChangsungKim/TestRepository01,ihoneymon/yobi,naver/yobi,yona-projects/yona,yona-projects/yona,yona-projects/yona,ahb0327/yobi,Limseunghwan/oss,bloodybear/yona,ihoneymon/yobi,naver/yobi,oolso/yobi,bloodybear/yona,doortts/fork-yobi,ihoneymon/yobi,bloodybear/yona,yona-projects/yona,violetag/demo,doortts/fork-yobi,brainagenet/yobi,Limseunghwan/oss,doortts/forked-for-history,doortts/fork-yobi,doortts/forked-for-history,brainagenet/yobi,bloodybear/yona,Limseunghwan/oss,oolso/yobi,ahb0327/yobi,ChangsungKim/TestRepository01,naver/yobi,brainagenet/yobi,doortts/forked-for-history