fmbt-stats: fix handling "=" in tagdist regular expression
fmbt-stats: fix handling "=" in tagdist regular expression

mlq/fMBT,pyykkis/fMBT,violep01/fMBT,CosminNiculae/fMBT,pombreda/fMBT,pablovirolainen/fMBT,yoonkiss/fMBT,rseymour/fMBT,01org/fMBT,pombreda/fMBT,pyykkis/fMBT,heivi/fMBT,CosminNiculae/fMBT,mlq/fMBT,acozzette/fMBT,mlq/fMBT,heivi/fMBT,violep01/fMBT,pyykkis/fMBT,acozzette/fMBT,rseymour/fMBT,giantpinkwalrus/fMBT,acozzette/fMBT,rseymour/fMBT,rseymour/fMBT,violep01/fMBT,pombreda/fMBT,yoonkiss/fMBT,OMKR/fMBT,giantpinkwalrus/fMBT,mlq/fMBT,pablovirolainen/fMBT,mlq/fMBT,CosminNiculae/fMBT,heivi/fMBT,mixu-/fMBT,01org/fMBT,pablovirolainen/fMBT,giantpinkwalrus/fMBT,OMKR/fMBT,rseymour/fMBT,heivi/fMBT,giantpinkwalrus/fMBT,pyykkis/fMBT,pablovirolainen/fMBT,pombreda/fMBT,OMKR/fMBT,01org/fMBT,OMKR/fMBT,yoonkiss/fMBT,mixu-/fMBT,CosminNiculae/fMBT,rseymour/fMBT,heivi/fMBT,pombreda/fMBT,pablovirolainen/fMBT,heivi/fMBT,CosminNiculae/fMBT,mixu-/fMBT,violep01/fMBT,violep01/fMBT,mlq/fMBT,OMKR/fMBT,01org/fMBT,pyykkis/fMBT,pombreda/fMBT,pablovirolainen/fMBT,pyykkis/fMBT,mixu-/fMBT,CosminNiculae/fMBT,giantpinkwalrus/fMBT,acozzette/fMBT,yoonkiss/fMBT,01org/fMBT,acozzette/fMBT,yoonkiss/fMBT,CosminNiculae/fMBT,OMKR/fMBT,rseymour/fMBT,heivi/fMBT,mixu-/fMBT,pombreda/fMBT,mlq/fMBT