By Matt Audilet Peyton Manning is the king of “Omaha.” The all-time great quarterback was in the crowd for Day 1 of the College World Series at Omaha — wearing a custom hat tagged with his iconic “Omaha” audible call. The sports world took to Twitter to react to Manning’s hat. “This funny af. I can hear him saying it,” one fan wrote. “I’ve said this before and I’ll say this again – The more Peyton Manning we get, the better this country will be,” another added. Manning’s alma mater, Tennessee, fell to Notre Dame in three games during last week’s Knoxville Super Regional. “I bet he bought these…