[BitBucket user: asch99]
[BitBucket date: 2017-09-13.16:27:32]

On Ubuntu 17.04 the PostgreSQL plugin build 

```
#!python

cmake -DCMAKE_BUILD_TYPE=Release -DALLOW_DOWNLOADS=ON  -DSTATIC_BUILD=ON

```

fails because of incompatible declarations of ISINF in postgresql 9.6.1 and boost 1.64.0. Adding

```
#!python

-DHAVE_ISINF=ON

```
to the cmake line gives a clean compile.  While this is not a bug, it would be nice to document this fix for the unexpected failed build, while previous version of boost did work.