net_utils: test IP & ipList for IPv4, warn if not
net_utils: test IP & ipList for IPv4, warn if not

tightened up parens (style guide)
replaced a "throw" with logerror
export 'net' instead of 'isIPv4', consistency

fatalbanana/Haraka,abhas/Haraka,haraka/Haraka,slattery/Haraka,hatsebutz/Haraka,MignonCornet/Haraka,abhas/Haraka,MignonCornet/Haraka,smfreegard/Haraka,msimerson/Haraka,typingArtist/Haraka,jaredj/Haraka,AbhilashSrivastava/haraka_sniffer,msimerson/Haraka,niteoweb/Haraka,typingArtist/Haraka,hiteshjoshi/my-haraka-config,craigslist/Haraka,fredjean/Haraka,hiteshjoshi/my-haraka-config,niteoweb/Haraka,smfreegard/Haraka,typingArtist/Haraka,bsmr-x-script/Haraka,hatsebutz/Haraka,Synchro/Haraka,Synchro/Haraka,Dexus/Haraka,haraka/Haraka,jjz/Haraka,jjz/Haraka,AbhilashSrivastava/haraka_sniffer,msimerson/Haraka,haraka/Haraka,baudehlo/Haraka,craigslist/Haraka,DarkSorrow/Haraka,DarkSorrow/Haraka,niteoweb/Haraka,smfreegard/Haraka,fatalbanana/Haraka,Synchro/Haraka,DarkSorrow/Haraka,MignonCornet/Haraka,slattery/Haraka,zombified/Haraka,danucalovj/Haraka,baudehlo/Haraka,zombified/Haraka,jjz/Haraka,slattery/Haraka,Dexus/Haraka,MignonCornet/Haraka,danucalovj/Haraka,baudehlo/Haraka,DarkSorrow/Haraka,Dexus/Haraka,haraka/Haraka,jjz/Haraka,jaredj/Haraka,jaredj/Haraka,bsmr-x-script/Haraka,Synchro/Haraka,bsmr-x-script/Haraka,zombified/Haraka,abhas/Haraka,smfreegard/Haraka,typingArtist/Haraka,msimerson/Haraka,fredjean/Haraka,hiteshjoshi/my-haraka-config,zombified/Haraka,AbhilashSrivastava/haraka_sniffer,bsmr-x-script/Haraka,slattery/Haraka,fatalbanana/Haraka,danucalovj/Haraka,fatalbanana/Haraka,Dexus/Haraka,hatsebutz/Haraka,danucalovj/Haraka,hatsebutz/Haraka,craigslist/Haraka,AbhilashSrivastava/haraka_sniffer,baudehlo/Haraka,fredjean/Haraka,craigslist/Haraka,jaredj/Haraka