50access-log.t regex fails for october
50access-log.t regex fails for october

```
    #   Failed test at t/50access-log.t line 44.
    #                   '2016-10-03T15:37:36'
    #     doesn't match
'(?^:^20[0-9]{2}-(?:0[0-9]|1[12])-(?:[012][0-9]|3[01])T[0-9]{2}:[0-9]{2}:[0-9]{2}$)'
killing h2o...
killed (got 0)
    # Looks like you failed 1 test of 1.
```

We modifiy also the regex to reject 00 as a month.

zlm2012/h2o,h2o/h2o,rayrapetyan/h2o,zlm2012/h2o,rayrapetyan/h2o,tamediadigital/h2o,h2o/h2o,h2o/h2o,yannick/h2o,cubicdaiya/h2o,deweerdt/h2o,devnexen/h2o,h2o/h2o,cwyang/h2o,cubicdaiya/h2o,cubicdaiya/h2o,h2o/h2o,yannick/h2o,yannick/h2o,i110/h2o,rayrapetyan/h2o,zlm2012/h2o,lkwg82/h2o,tamediadigital/h2o,tamediadigital/h2o,lkwg82/h2o,devnexen/h2o,devnexen/h2o,lkwg82/h2o,cubicdaiya/h2o,devnexen/h2o,deweerdt/h2o,cwyang/h2o,lkwg82/h2o,rayrapetyan/h2o,tamediadigital/h2o,lkwg82/h2o,lkwg82/h2o,i110/h2o,zlm2012/h2o,lkwg82/h2o,rayrapetyan/h2o,cwyang/h2o,rayrapetyan/h2o,yannick/h2o,zlm2012/h2o,zlm2012/h2o,cubicdaiya/h2o,cwyang/h2o,cwyang/h2o,tamediadigital/h2o,i110/h2o,yannick/h2o,cubicdaiya/h2o,cubicdaiya/h2o,tamediadigital/h2o,devnexen/h2o,zlm2012/h2o,devnexen/h2o,tamediadigital/h2o,rayrapetyan/h2o,yannick/h2o,zlm2012/h2o,rayrapetyan/h2o,rayrapetyan/h2o,i110/h2o,h2o/h2o,h2o/h2o,devnexen/h2o,deweerdt/h2o,deweerdt/h2o,yannick/h2o,cwyang/h2o,cwyang/h2o,i110/h2o,rayrapetyan/h2o,i110/h2o,devnexen/h2o,deweerdt/h2o,tamediadigital/h2o,deweerdt/h2o,cubicdaiya/h2o,yannick/h2o,i110/h2o,deweerdt/h2o,i110/h2o,deweerdt/h2o,zlm2012/h2o,tamediadigital/h2o,deweerdt/h2o,cwyang/h2o,devnexen/h2o,yannick/h2o,i110/h2o,lkwg82/h2o,h2o/h2o,lkwg82/h2o,h2o/h2o,i110/h2o