The most important result for the San Antonio Spurs over the early weeks of this NBA season will probably come on Nov. 4. And the team doesn’t even have a game that day. Voters in Bexar County, Texas, are headed to the polls soon — early voting starts Monday and runs through Oct. 31, then actual Election Day voting happens on Nov. 4 — to decide if county officials will be permitted to commit no more than $311 million in what are called venue taxes to help build a new multipurpose arena that the