Refined Dennis's patch for mitigating a cygwin issue with sleep statements in configure.ac so that only cygwin builds are affected.
Refined Dennis's patch for mitigating a cygwin issue with sleep statements in configure.ac so that only cygwin builds are affected.

Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c,Unidata/netcdf-c