Remove the current open-file limits on uninstall and align the Log2RAM check

- Uninstalling removes DefaultLimitNOFILE=1048576 and ulimit -n 1048576 as well as the legacy 256000 lines
- The customizable post-install runs the Log2RAM check every 10 minutes at low priority, as the automated one does

scripts/post_install/customizable_post_install.sh

@@ -3580,7 +3580,8 @@ EOF
 SHELL=/bin/bash
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
 MAILTO=""
-*/5 * * * * root /usr/local/bin/log2ram-check.sh >/dev/null 2>&1
+# nice/ionice keep the check off the priority queue for scheduled tasks.
+3-59/10 * * * * root nice -n 19 ionice -c 3 /usr/local/bin/log2ram-check.sh >/dev/null 2>&1
 EOF
         chmod 0644 /etc/cron.d/log2ram-auto-sync
         chown root:root /etc/cron.d/log2ram-auto-sync

scripts/post_install/uninstall-tools.sh

@@ -581,7 +581,7 @@ uninstall_system_limits() {
     # Remove systemd limits (restore defaults)
     for file in /etc/systemd/system.conf /etc/systemd/user.conf; do
         if [ -f "$file" ]; then
-            pmx_edit_file "$file" '/^DefaultLimitNOFILE=256000/d'
+            pmx_edit_file "$file" -e '/^DefaultLimitNOFILE=256000$/d' -e '/^DefaultLimitNOFILE=1048576$/d'
         fi
     done
     
@@ -594,7 +594,7 @@ uninstall_system_limits() {
     
     # Remove ulimit from profile
     if [ -f /root/.profile ]; then
-        pmx_edit_file /root/.profile '/ulimit -n 256000/d'
+        pmx_edit_file /root/.profile -e '/^ulimit -n 256000$/d' -e '/^ulimit -n 1048576$/d'
     fi
     
     # Reload sysctl