Standardize iptables paths across firewall scripts and Go code to ensure compatibility with systems where iptables is located in /usr/sbin. This affects both legacy and non-legacy iptables binaries.
Instead of prefix matching on the part before the first dash, now strip
all dashes from both the lookup name and the stored container/selector
names and compare exactly. This improves matching accuracy for names
containing multiple dashes or dashes in varying positions.
