main/spice-gtk: upgrade to 0.24
main/glib-networking: upgrade to 2.40.1
main/ca-certificates: rewrite update-ca-certificates in lua

fix also overlay protected paths to exclude generated links.
ref #2846
main/evince: upgrade to 3.12.1
main/gmime: upgrade to 2.6.20
main/gnome-icon-theme: upgrade to 3.12.0
main/bluez: upgrade to 5.18
main/dconf: upgrade to 0.20.0
main/geany: upgrade to 1.24.1
main/giflib: upgrade to 5.0.6
main/glade: upgrade to 3.18.2
main/glibmm: upgrade to 2.40.0
main/gnome-icon-theme-symbolic: upgrade to 3.12.0
main/gnutls: upgrade to 3.3.1
main/lcms2: upgrade to 2.6
main/libmicrohttpd: upgrade to 0.9.34
main/update-ca-certificates: fix few minor issues in lua version

also optimize and cleanup the lua code a bit too. ref #2846
testing/py-mako: depend on py-markupsafe
testing/ipvsadm: upgrade to 1.27, musl build fix
main/hwdata: upgrade to 0.263