Fixed troff warning in versions above groff-1.23 #1787

Job	Run time
osx clang --disable-ssl	6m 15s
osx clang --disable-ssl	6m 15s
linux rpm fedora	6m 26s
linux rpm fedora	6m 26s
dpdk gcc	10s
dpdk gcc	10s
linux deb no dpdk	7m 13s
linux deb no dpdk	7m 13s
linux gcc --disable-ssl	3m 53s
linux gcc --disable-ssl	3m 53s
linux clang --disable-ssl	3m 51s
linux clang --disable-ssl	3m 51s
linux gcc test	13m 43s
linux gcc test	13m 43s
linux clang test asan	23m 34s
linux clang test asan	23m 46s
linux clang test ubsan	13m 1s
linux clang test ubsan	13m 1s
linux gcc test --enable-shared	18m 0s
linux gcc test --enable-shared	18m 0s
linux clang test --enable-shared	17m 11s
linux clang test --enable-shared	17m 11s
linux gcc test dpdk	10m 26s
linux gcc test dpdk	10m 26s
linux clang test dpdk	10m 4s
linux clang test dpdk	10m 4s
linux gcc test -ljemalloc	10m 50s
linux gcc test -ljemalloc	10m 50s
linux clang test -ljemalloc	13m 34s
linux clang test -ljemalloc	13m 34s
linux gcc --enable-afxdp	3m 28s
linux gcc --enable-afxdp	3m 28s
linux clang --enable-afxdp	3m 18s
linux clang --enable-afxdp	3m 18s
linux gcc dpdk --enable-shared	5m 9s
linux gcc dpdk --enable-shared	5m 9s
linux clang dpdk --enable-shared	5m 19s
linux clang dpdk --enable-shared	5m 19s
linux gcc dpdk-shared	5m 19s
linux gcc dpdk-shared	5m 19s
linux clang dpdk-shared	4m 5s
linux clang dpdk-shared	4m 5s
linux gcc dpdk-shared --enable-shared	4m 48s
linux gcc dpdk-shared --enable-shared	4m 48s
linux clang dpdk-shared --enable-shared	4m 4s
linux clang dpdk-shared --enable-shared	4m 4s
linux gcc m32 --disable-ssl	3m 32s
linux gcc m32 --disable-ssl	3m 32s
	6h 34m 38s

Provide feedback