Increase default limit on TCP handler processes from 20 to 30.

There's evidence that modern Chrome may need this. It has been 20
forever, and hardware inflation would support an increase.

https://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2026q2/018450.html

src/config.h

@@ -15,7 +15,7 @@
 */
 
 #define FTABSIZ 150 /* max number of outstanding requests (default) */
-#define MAX_PROCS 20 /* default max no children for TCP requests */
+#define MAX_PROCS 30 /* default max no children for TCP requests */
 #define CHILD_LIFETIME 150 /* secs 'till terminated (RFC1035 suggests > 120s) */
 #define TCP_MAX_QUERIES 100 /* Maximum number of queries per incoming TCP connection */
 #define TCP_TIMEOUT 5 /* timeout waiting to connect to an upstream server - double this for answer */