fix UTF8MB4 problems, make an option, add info and also change documentation links
fix UTF8MB4 problems, make an option, add info and also change documentation links

ekospinach/wallabag,milanaleksic/wallabag,freddyb/wallabag,freddyb/wallabag,wangjun/wallabag,wangjun/wallabag,freddyb/wallabag,antoniosejas/wallabag,modos189/wallabag,kwangkim/wallabag,harikt/wallabag,kwangkim/wallabag,ekospinach/wallabag,harikt/wallabag,modos189/wallabag,mubassirhayat/wallabag,mubassirhayat/wallabag,milanaleksic/wallabag,kwangkim/wallabag,wangjun/wallabag,milanaleksic/wallabag,antoniosejas/wallabag,modos189/wallabag,harikt/wallabag,mubassirhayat/wallabag,antoniosejas/wallabag,ekospinach/wallabag