net/traefik: Update to upstream release 3.4.0

Details:
- Update to 3.4.x branch, see:
  https://github.com/traefik/traefik/releases/tag/v3.4.0
- While most configurations are expected to continue to work, a change
  in the Kubernetes CRD provider may require manual config updates for
  HTTP load balancing:
  https://doc.traefik.io/traefik/master/migration/v3/#v33-to-v34

MFH:		2025Q2

net/traefik/Makefile

@@ -1,5 +1,5 @@
 PORTNAME=	traefik
-PORTVERSION=	3.3.6
+PORTVERSION=	3.4.0
 CATEGORIES=	net
 MASTER_SITES=	LOCAL/riggs/${PORTNAME}
 

net/traefik/distinfo

@@ -1,3 +1,3 @@
-TIMESTAMP = 1745012563
-SHA256 (traefik-3.3.6.tar.xz) = c473e991408c712d4f361c2d07b1b2bb839ab823a87b18fe3ffe52187bb9904c
-SIZE (traefik-3.3.6.tar.xz) = 24312792
+TIMESTAMP = 1746858633
+SHA256 (traefik-3.4.0.tar.xz) = 2a141f9c25aea7d6b74907bf1451e2b9d04c0e47ed13124d45edbaef9e53f479
+SIZE (traefik-3.4.0.tar.xz) = 24394892