chore: configure current repository as a version

And use it as default version.

To this end, the scripts in bin/hardening have been made generic by removing the associated recommendation number.
Only impact is if you are used to execute scripts directly from bin/hardening.
In this case, please use the "bin/hardening.sh" wrapper as intended.

I had to rename 2.3.1_disable_nis.sh to uninstall_nis.sh, as it was conflicting with 2.3.1_disable_nis.sh

Also, there was a doublon between 1.1.1.8_disable_cramfs.sh and 99.1.1.1_disable_cramfs.sh ; the former was kept

bin/hardening/check_distribution.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# run-shellcheck
+#
+# OVH Security audit
+#
+
+#
+# 99.99 Ensure that the distribution version is debian and that the version is 9 or 10
+#
+
+set -e # One error, it's over
+set -u # One variable unset, it's over
+
+# shellcheck disable=2034
+HARDENING_LEVEL=1
+# shellcheck disable=2034
+DESCRIPTION="Check the distribution and the distribution version"
+
+# This function will be called if the script status is on enabled / audit mode
+audit() {
+    if [ "$DISTRIBUTION" != "debian" ]; then
+        crit "Your distribution has been identified as $DISTRIBUTION which is not debian"
+    else
+        if [ "$DEB_MAJ_VER" = "sid" ] || [ "$DEB_MAJ_VER" -gt "$HIGHEST_SUPPORTED_DEBIAN_VERSION" ]; then
+            crit "Your distribution is too recent and is not yet supported."
+        elif [ "$DEB_MAJ_VER" -lt "$SMALLEST_SUPPORTED_DEBIAN_VERSION" ]; then
+            crit "Your distribution is debian but is deprecated. Consider upgrading to a supported version."
+        else
+            ok "Your distribution is debian and the version is supported"
+
+        fi
+    fi
+}
+
+# This function will be called if the script status is on enabled mode
+apply() {
+    echo "Reporting only here, upgrade your debian version to a supported version if you're on debian"
+    echo "If you use another distribution, consider applying rules corresponding with your distribution available at https://www.cisecurity.org/"
+}
+
+# This function will check config parameters required
+check_config() {
+    :
+}
+
+# Source Root Dir Parameter
+if [ -r /etc/default/cis-hardening ]; then
+    # shellcheck source=../../debian/default
+    . /etc/default/cis-hardening
+fi
+if [ -z "$CIS_LIB_DIR" ]; then
+    echo "There is no /etc/default/cis-hardening file nor cis-hardening directory in current environment."
+    echo "Cannot source CIS_LIB_DIR variable, aborting."
+    exit 128
+fi
+
+# Main function, will call the proper functions given the configuration (audit, enabled, disabled)
+if [ -r "${CIS_LIB_DIR}"/main.sh ]; then
+    # shellcheck source=../../lib/main.sh
+    . "${CIS_LIB_DIR}"/main.sh
+else
+    echo "Cannot find main.sh, have you correctly defined your root directory? Current value is $CIS_LIB_DIR in /etc/default/cis-hardening"
+    exit 128
+fi