Prefer xfreerdp for RDP connections on Linux hosts.
Prefer xfreerdp for RDP connections on Linux hosts.

Rather than only using rdesktop (which does not work properly with newer
versions of RDP), use xfreerdp if available and fall back to rdesktop if
not.

petems/vagrant,marxarelli/vagrant,marxarelli/vagrant,justincampbell/vagrant,sni/vagrant,kamigerami/vagrant,crashlytics/vagrant,PatOShea/vagrant,lukebakken/vagrant,lonniev/vagrant,taliesins/vagrant,sni/vagrant,petems/vagrant,taliesins/vagrant,crashlytics/vagrant,chrisroberts/vagrant,chrisroberts/vagrant,krig/vagrant,signed8bit/vagrant,bryson/vagrant,kamazee/vagrant,johntron/vagrant,aneeshusa/vagrant,aneeshusa/vagrant,sni/vagrant,mkuzmin/vagrant,carlosefr/vagrant,krig/vagrant,chrisroberts/vagrant,PatOShea/vagrant,vamegh/vagrant,mitchellh/vagrant,benh57/vagrant,bshurts/vagrant,aneeshusa/vagrant,tomfanning/vagrant,marxarelli/vagrant,TheBigBear/vagrant,mwrock/vagrant,crashlytics/vagrant,bshurts/vagrant,bryson/vagrant,krig/vagrant,TheBigBear/vagrant,vamegh/vagrant,invernizzi-at-google/vagrant,benh57/vagrant,Chhed13/vagrant,mitchellh/vagrant,jtopper/vagrant,bdwyertech/vagrant,sax/vagrant,PatrickLang/vagrant,PatrickLang/vagrant,bdwyertech/vagrant,mwrock/vagrant,marxarelli/vagrant,gitebra/vagrant,justincampbell/vagrant,vamegh/vagrant,justincampbell/vagrant,mkuzmin/vagrant,bryson/vagrant,tomfanning/vagrant,benizi/vagrant,carlosefr/vagrant,gitebra/vagrant,jtopper/vagrant,vamegh/vagrant,crashlytics/vagrant,krig/vagrant,petems/vagrant,lonniev/vagrant,justincampbell/vagrant,petems/vagrant,aaam/vagrant,Endika/vagrant,kamigerami/vagrant,kamazee/vagrant,sax/vagrant,tomfanning/vagrant,kamigerami/vagrant,taliesins/vagrant,invernizzi-at-google/vagrant,tomfanning/vagrant,mitchellh/vagrant,bdwyertech/vagrant,lonniev/vagrant,TheBigBear/vagrant,sax/vagrant,Chhed13/vagrant,sax/vagrant,lonniev/vagrant,mitchellh/vagrant,jtopper/vagrant,bryson/vagrant,PatrickLang/vagrant,lukebakken/vagrant,bshurts/vagrant,Chhed13/vagrant,mwrock/vagrant,aaam/vagrant,taliesins/vagrant,Endika/vagrant,kamigerami/vagrant,Endika/vagrant,PatOShea/vagrant,benizi/vagrant,mwrock/vagrant,gitebra/vagrant,kamazee/vagrant,mkuzmin/vagrant,lukebakken/vagrant,TheBigBear/vagrant,PatrickLang/vagrant,Chhed13/vagrant,carlosefr/vagrant,johntron/vagrant,mkuzmin/vagrant,kamazee/vagrant,benizi/vagrant,invernizzi-at-google/vagrant,aneeshusa/vagrant,aaam/vagrant,lukebakken/vagrant,PatOShea/vagrant,sni/vagrant,benh57/vagrant,gitebra/vagrant,chrisroberts/vagrant,signed8bit/vagrant,jtopper/vagrant,bdwyertech/vagrant,signed8bit/vagrant,signed8bit/vagrant,benizi/vagrant,johntron/vagrant,johntron/vagrant,Endika/vagrant,invernizzi-at-google/vagrant,aaam/vagrant,benh57/vagrant,bshurts/vagrant,carlosefr/vagrant