[PATCHv2 0/5] git-config and large integers

Here's a re-roll (and re-design) of my series to help with "git config" and large integers. It takes the different approach we discussed of simply removing (well, increasing) the range limits for "git config --int".

I also improved the error messages for bogus config (patches 3-4).

  [1/5]: config: factor out integer parsing from range checks
  [2/5]: config: properly range-check integer values
  [3/5]: config: set errno in numeric git_parse_* functions
  [4/5]: config: make numeric parsing errors more clear
  [5/5]: git-config: always treat --int as 64-bit internally

-Peff