Merge branch 'es/meson-cleanup'

Merge branch 'es/meson-cleanup'

Code clean-up for meson-based build infrastructure.

* es/meson-cleanup:
  meson: only check for missing networking syms on non-Windows; add compat impls
  meson: fix typo in function check that prevented checking for hstrerror
  meson: add a couple missing networking dependencies
  meson: do a full usage-based compile check for sysinfo
  meson: check for getpagesize before using it
  meson: simplify and parameterize various standard function checks