Added warning for missing popt libs
Added warning for missing popt libs

Salamek/librsync,yrgoldteeth/librsync,Salamek/librsync,yrgoldteeth/librsync,librsync/librsync,dbaarda/librsync,librsync/librsync,dbaarda/librsync,dbaarda/librsync,sourcefrog/librsync,librsync/librsync,sourcefrog/librsync,Salamek/librsync,yrgoldteeth/librsync,sourcefrog/librsync,yrgoldteeth/librsync,sourcefrog/librsync,librsync/librsync,dbaarda/librsync