system-traffic: Fix syntax errors in FTP and IPv6 curl calls. #2547

Job	Run time
dpdk gcc (ubuntu-24.04)	5s
libreswan (ubuntu-24.04)	6s
linux deb no dpdk	10m 58s
linux rpm fedora	3m 53s
osx clang --disable-ssl	1m 54s
clang-analyze	20m 9s
linux gcc --disable-ssl	3m 10s
linux clang --disable-ssl	2m 47s
linux gcc c99	2m 37s
linux clang c99	2m 44s
linux gcc test	8m 36s
linux clang address,undefined test	16m 9s
linux gcc test --enable-shared	11m 2s
linux clang test --enable-shared	14m 36s
linux gcc check check-dpdk dpdk	19m 48s
linux clang check check-dpdk dpdk	18m 6s
linux gcc test -ljemalloc	9m 12s
linux clang test -ljemalloc	8m 41s
linux gcc --enable-afxdp	2m 51s
linux clang --enable-afxdp	2m 42s
linux gcc dpdk --enable-shared	4m 16s
linux clang dpdk --enable-shared	3m 41s
linux gcc dpdk-shared	3m 0s
linux clang dpdk-shared	2m 52s
linux gcc dpdk-shared --enable-shared	3m 50s
linux clang dpdk-shared --enable-shared	3m 49s
linux gcc m32 --disable-ssl	3m 20s
linux gcc check-ovsdb-cluster	7m 15s
linux gcc check-kernel -100	11m 14s
linux gcc check-kernel 100-	15m 38s
linux clang address,undefined check-kernel -100	13m 17s
linux clang address,undefined check-kernel 100-	20m 0s
linux gcc check-offloads -100	10m 16s
linux gcc check-offloads 100-	11m 8s
linux gcc dpdk check-system-userspace	12m 27s
linux clang address,undefined dpdk check-system-userspace	16m 30s
linux gcc dpdk check-system-tso	11m 57s
linux gcc dpdk check-afxdp	12m 10s
	5h 26m 46s

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