[VOTE] Release apr-1.7.3

[Ruediger Pluem]

1.7.3-rc1 is here:

https://apr.apache.org/dev/dist/

For the release of apr-1.7.3
  [  ]  +1 looks great!
  [  ]  -1 something is broken

I will let the vote run through end-of-week.

Regards

Rüdiger