Fix ESCAPE issues in IP reputation and user manager

- Added -- separator to grep/awk commands in lib/ip-reputation.sh (4 fixes)
- Added -- separator to grep commands in lib/user-manager.sh (2 fixes)
- Prevents filename injection attacks

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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

lib/user-manager.sh

@@ -124,8 +124,8 @@ get_cpanel_user_info() {
     fi
 
     # Parse cPanel user file
-    local primary_domain=$(grep "^DNS=" "$user_file" | cut -d= -f2)
-    local email=$(grep "^CONTACTEMAIL=" "$user_file" | cut -d= -f2)
+    local primary_domain=$(grep "^DNS=" -- "$user_file" | cut -d= -f2)
+    local email=$(grep "^CONTACTEMAIL=" -- "$user_file" | cut -d= -f2)
 
     # cPanel doesn't store HOMEDIR in user file - it's always /home/username
     local home_dir="/home/${username}"