fix handling of regex cli options

[taybin]

This improves the handling of whitelist-regex and blacklist-regex options which was simply confusing.

Before, you'd need to do something like --whitelist table1,table2 --whitelist-regex true, which also wasn't documented.

This improves it so it functions as desired, so that it can be either --whitelist table1,table2 or --whitelist-regex table1,table2. And so on for the blacklist feature as well.

[stlava]

I'm sorry for the huge delay in looking at this. The intention makes sense but I've made a note that the mutual exclusive check needs to be made before the if else chain.

[stlava]

This check should go above the if else chain because filterConfigCount will never go above 1.

[taybin]

I see what you mean. A better fix might be to change the if-else chain into just if-statements so that filterConfigCount actually adds up instead of defaulting to whatever the first match is in case of multiple, conflicting configurations.