DedupeStrings take a slice of string and dedupe it.

DedupeURLs take a slice of *url.URL and dedupe it.

FileExists checks if a file exists and is not a directory before we try using it to prevent further errors.

Note: GetOutboundIP does not establish any connection and the destination does not need to exist for this function to work.

GetSHA1 take a string and return the SHA1 hash of the string, as a string.

GetSHA1FromFile calculate the SHA1 of a file.

MakeAbsolute turn all URLs in a slice of url.URL into absolute URLs, based on a given base *url.URL.

StringContainsSliceElements if the string contains one of the elements of a slice.

StringInSlice return true if the string is in the slice.

StringSliceToURLSlice takes a slice of string and return a slice of url.URL.

ValidateURL validates a *url.URL.

TAtomBool define an atomic boolean.