[dn42-schema.py] implement find() using git remote

without depending on registry.dn42.us

[dn42-schema.py]: implement _get_parent_inetnums for policy checks of new inetnums

[dn42-schema.py] implement as-block check backend

[dn42-schema.py] implement for route{,6}

[dn42-schema.py] implement @family= without @netlevel

[dn42-schema.py] move new to dn42_schema_local.py + restore dn42-schema.py

[dn42-schema.py] add "check-pol2" using new dn42_schema_local.py

check-pol

@@ -1,5 +1,5 @@
 #!/usr/bin/env bash
-set -eo pipefail
+set -o pipefail
 
 if [ $# -eq 0 ]
   then

check-pol2

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -o pipefail
+
+if [ $# -eq 0 ]
+  then
+    echo "Usage: $0 COMMIT YOUR-MNT"
+    exit
+fi
+
+BASE="$(readlink -f "$0" 2>/dev/null || python -c 'import os,sys;print(os.path.realpath(sys.argv[1]))' "$0")"
+BASE="$(dirname "$BASE")"
+cd "$BASE" || exit 1
+
+git diff --name-only $1 | while IFS='/' read -ra LINE; do
+if [[ "${LINE[0]}" = "data" && -n "${LINE[2]}" ]]; then
+	utils/schema-check/dn42_schema_local.py -v policy ${LINE[1]} ${LINE[2]} $2
+fi
+done