====== upgrade Haproxy 3.4 debian linux ======
<code>
wget https://www.haproxy.org/download/3.4/src/haproxy-3.4.3.tar.gz
tar xvzf haproxy-3.4.3.tar.gz
cd haproxy-3.4.3
make TARGET=linux-glibc USE_PCRE2=1 USE_OPENSSL=1 USE_ZLIB=1 USE_SYSTEMD=1 -j$(nproc)
make install
</code>

kemudian
<code>
cp -f /usr/local/sbin/haproxy /usr/sbin
</code>