Generate62RandomString creates a random string with the given length consisting of characters in [A-Za-z0-9].

GenerateFriendlyRandomString creates a random string of characters with the given length consisting of characters in [a-z0-9].

GenerateRandomString creates a random string of characters of the given length from the given dictionary of possible characters.

GenSafeUniqueSlug generatees a reasonably unique random slug from the given original slug.