Fix pcap capture error
Fix pcap capture error

When the capture is interrupted by a signal, this should not be reported
as an error.

lcheylus/haka,nabilbendafi/haka,lcheylus/haka,LubyRuffy/haka,Wingless-Archangel/haka,LubyRuffy/haka,lcheylus/haka,nabilbendafi/haka,Wingless-Archangel/haka,nabilbendafi/haka,haka-security/haka,haka-security/haka,haka-security/haka