Fix google group url and issue urls
Fix google group url and issue urls

The issue URLs pointed to JMDB4 instead of MapDB, and the google group link suffered from the same problem :-(
lamfire/mapdb,jankotek/MapDB,ringoluo/mapdb,morfeo8marc/mapdb,cocosli/mapdb,olupas/MapDB,olupas/MapDB,binarytemple/mapdb,pettermahlen/mapdb,jankotek/MapDB,hangum/mapdb,sumit784/mapdb,SleimanJneidi/mapdb,ffjiao/mapdb,jankotek/mapdb,mebigfatguy/mapdb,mebigfatguy/mapdb,jankotek/mapdb,codeaudit/mapdb