fix: resolve unbound variable in trap and support equals sign in #Access

wg-sync-policy.sh

@@ -35,7 +35,7 @@ main() {
     # Temporary file for atomic write
     local tmp_policy
     tmp_policy="$(mktemp /tmp/wg-policy.XXXXXX)"
-    trap 'rm -f "$tmp_policy" 2>/dev/null; release_lock' EXIT
+    trap "rm -f \"$tmp_policy\" 2>/dev/null; release_lock" EXIT
 
     echo '{"clients":{}}' > "$tmp_policy"
 
@@ -52,18 +52,12 @@ main() {
                 split($i,a," = ")
                 gsub(/ /,"",a[2])
                 split(a[2],b,",")
-                
-                # First IP is the client IP
                 split(b[1],c,"/")
                 ip=c[1]
-                
-                # The rest of the IPs are access targets
-                access_arr=""
-                for(j=2;j<=length(b);j++) {
-                    if(access_arr=="") access_arr = b[j]
-                    else access_arr = access_arr "," b[j]
-                }
-                access = access_arr
+            }
+            if($i ~ /^#Access/) {
+                sub(/^#Access[ \t]*=?[ \t]*/, "", $i)
+                access=$i
             }
         }
         if(ip!="" && ip!="0.0.0.0" && ip!="::") {