Solaris fixes
Fixes builds using meson on Solaris, and enables code in pa_close_all to use /proc to only close fd's that are actually open.
(On Solaris, the default fd limit for 64-bit processes is 65535, so this can save a lot of close() calls.)
Fixes builds using meson on Solaris, and enables code in pa_close_all to use /proc to only close fd's that are actually open.
(On Solaris, the default fd limit for 64-bit processes is 65535, so this can save a lot of close() calls.)