[feat] Add text/html to OPDSBrowser (#6335)
[feat] Add text/html to OPDSBrowser (#6335)


Frenzie/koreader,koreader/koreader,Markismus/koreader,poire-z/koreader,mwoz123/koreader,pazos/koreader,koreader/koreader,NiLuJe/koreader,NiLuJe/koreader,Frenzie/koreader,Hzj-jie/koreader,poire-z/koreader