ITS#5422 Save errno before passing it to Debug()

3 jobs for its9348 in 28 minutes and 51 seconds (queued for 1 second)
Status Job ID Name Coverage
  Build
passed #2271
build-gnutls-mit

00:25:20

passed #2269
build-no-threads-no-slapd

00:03:31

passed #2270
build-openssl-heimdal

00:28:03