gh-102: Optional password reset

Fixes #102

src/etc/one-context.d/loc-20-set-username-password

@@ -27,6 +27,9 @@ fi
 GRANT_SUDO=${GRANT_SUDO:-YES}
 GRANT_SUDO=$(echo "${GRANT_SUDO}" | tr '[:lower:]' '[:upper:]')
 
+PASSWORD_RESET=${PASSWORD_RESET:-YES}
+PASSWORD_RESET=$(echo "${PASSWORD_RESET}" | tr '[:lower:]' '[:upper:]')
+
 if [ "${GRANT_SUDO}" == "YES" ] && [ "${USERNAME}" != "root" ]; then
     echo "${USERNAME} ALL=(ALL) NOPASSWD:ALL" >/etc/sudoers.d/one-context
     chmod 0440 /etc/sudoers.d/one-context
@@ -58,6 +61,6 @@ ${PASSWORD}
 ${PASSWORD}
 EOF
 	fi
-else
+elif [ "${PASSWORD_RESET}" = 'YES' ]; then
     usermod -p '*' "${USERNAME}"
 fi