By Donavan Hall, Beer Columnist Last year I attended the Long Island Real Ale Festival with my beer writer hat on. This year, I’ll be there as a brewer. On January 6, my brewing buddy, Mike Voigt, and I mashed-in and brewed up a batch of an English-style Mild that we’ll be proud to serve at this Saturday’s Long Island Real Ale Festival held annually at the Blue Point Brewery in Patchogue. The beer has been fermenting away at Mike’s house for the last couple of weeks and earlier this week it was ready to transfer into the firkin.  We…