tmux should not set PKG_CONFIG_PATH (#4901)
tmux should not set PKG_CONFIG_PATH (#4901)

* fixes #967

* Version bump to 0.9.1

- Bugfixes for spack find
- 0.9.1 can read specs from current develop.

* Don't assume spack is in the path when building docs.

* Remove PKG_CONFIG_PATH from tmux configure

* Change tmux to AutotoolsPackage

* Correct link to libtinfo in tmux

skosukhin/spack,iulian787/spack,krafczyk/spack,lgarren/spack,tmerrick1/spack,mfherbst/spack,lgarren/spack,lgarren/spack,matthiasdiener/spack,tmerrick1/spack,LLNL/spack,krafczyk/spack,TheTimmy/spack,skosukhin/spack,EmreAtes/spack,mfherbst/spack,skosukhin/spack,TheTimmy/spack,tmerrick1/spack,matthiasdiener/spack,matthiasdiener/spack,iulian787/spack,LLNL/spack,mfherbst/spack,iulian787/spack,tmerrick1/spack,iulian787/spack,krafczyk/spack,EmreAtes/spack,EmreAtes/spack,iulian787/spack,EmreAtes/spack,krafczyk/spack,mfherbst/spack,TheTimmy/spack,EmreAtes/spack,LLNL/spack,lgarren/spack,krafczyk/spack,TheTimmy/spack,LLNL/spack,matthiasdiener/spack,matthiasdiener/spack,mfherbst/spack,skosukhin/spack,LLNL/spack,TheTimmy/spack,skosukhin/spack,lgarren/spack,tmerrick1/spack