A friend asked me before the show what kind of music Sebadoh was, and I had to say, “indie rock. They are like the definition of indie rock.” And they are, for me. Sebadoh and Pavement are basically the two bands I still think of when I hear the term. But I am showing my age. I still think of indie rock in terms of the ’90s, but the ’90s have been over for seven years. Today I don’t know what indie rock is supposed to sound like. But I am starting to realize that I’m not really that interested i…