Update haproxy

Changes:

- https://github.com/docker-library/haproxy/commit/a8dcd14: Merge pull request https://github.com/docker-library/haproxy/pull/90 from TimWolla/generate-stackbrew-library
- https://github.com/docker-library/haproxy/commit/f3bcdac: Update generate-stackbrew-library.sh for 2.0
- https://github.com/docker-library/haproxy/commit/0178f05: Merge pull request https://github.com/docker-library/haproxy/pull/89 from TimWolla/2.0
- https://github.com/docker-library/haproxy/commit/609bd62: Add haproxy 2.0
- https://github.com/docker-library/haproxy/commit/a9e8ad3: Update generated README

library/haproxy

@@ -1,25 +1,25 @@
-# this file is generated via https://github.com/docker-library/haproxy/blob/1e9525fb1db023943e1e37a0f26d9e2b77b74020/generate-stackbrew-library.sh
+# this file is generated via https://github.com/docker-library/haproxy/blob/f3bcdac877d725fb3abcabe3b0319b95dcceead8/generate-stackbrew-library.sh
 
 Maintainers: Tianon Gravi <[email protected]> (@tianon),
              Joseph Ferguson <[email protected]> (@yosifkit)
 GitRepo: https://github.com/docker-library/haproxy.git
 
-Tags: 2.0-dev7, 2.0-rc
+Tags: 2.0.0, 2.0, latest
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 898fd1533c9029a22fc2722bc36daa2dc901809a
-Directory: 2.0-rc
+GitCommit: 609bd629b73b3a37202308451a4aa71740984144
+Directory: 2.0
 
-Tags: 2.0-dev7-alpine, 2.0-rc-alpine
+Tags: 2.0.0-alpine, 2.0-alpine, alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
-GitCommit: 898fd1533c9029a22fc2722bc36daa2dc901809a
-Directory: 2.0-rc/alpine
+GitCommit: 609bd629b73b3a37202308451a4aa71740984144
+Directory: 2.0/alpine
 
-Tags: 1.9.8, 1.9, 1, latest
+Tags: 1.9.8, 1.9, 1
 Architectures: amd64, arm32v5, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 2c49aafa4925bf68402c003542f3f82c94cb2c0f
 Directory: 1.9
 
-Tags: 1.9.8-alpine, 1.9-alpine, 1-alpine, alpine
+Tags: 1.9.8-alpine, 1.9-alpine, 1-alpine
 Architectures: amd64, arm32v6, arm32v7, arm64v8, i386, ppc64le, s390x
 GitCommit: 2c49aafa4925bf68402c003542f3f82c94cb2c0f
 Directory: 1.9/alpine