misc: add a nerd knob to skip a sysctl during the .deb installation
In some cases, e.g. in the container installs, it's beneficial to skip
the sysctl portion of the installation.
This commit allows to do that by setting the environment variable
VPP_INSTALL_SKIP_SYSCTL.
Type: feature
#!/bin/sh -e
# try to set the required values now. This may or may not work.
+# Allow for a nerd knob to skip this, e.g. during the container installs
+if [ -z "${VPP_INSTALL_SKIP_SYSCTL}" ]
+then
sysctl --system
+fi
#DEBHELPER#
