Add configuration option to merge lines on signs.
If this is set to true, lines will be put together without spaces, so "This is|a sign" (where | is a line break) would become "This isa sign". This is good for catching advertisers - it detects advertising such as "Join google|.com", however it may also have several false positives: "This is|my house.|Is it good?" would be seen as advertising - house.is is a valid domain name.
If this is set to false, lines will be put together with spaces, so "This is|a sign" would become "This is a sign". This is good for preventing false positives (see above) but won't catch all advertisers.