RegexValidator.forURL is overly restrictive

[VirtualTim]

Regex is here:

FormsFX/formsfx-core/src/main/java/com/dlsc/formsfx/model/validators/RegexValidator.java

Line 86 in 9d12251

return new RegexValidator("(https?:\\/\\/(?:www\\.|(?!www))[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\\.[^\\s]{2,}|www\\.[a-zA-Z0-9][a-zA-Z0-9-]+[a-zA-Z0-9]\\.[^\\s]{2,}|https?:\\/\\/(?:www\\.|(?!www))[a-zA-Z0-9]\\.[^\\s]{2,}|www\\.[a-zA-Z0-9]\\.[^\\s]{2,})", errorMessage);

Basically this marks urls like https://localhost:80/ as invalid.