Add two int values, returning an error if the result overflows.

Add a slice of ints, returning an error if the result overflows.

will overwrite m1 with m2's values.

combines string arrays and removes duplicates (returns a new array).

does *not* close outputCh on EOF or error.

returns (isEOF, error).

on error just returns "" does not return "application/octet-stream" as this is considered a detection failure.

on encoding error returns "" this is used to perform logic on first value without decoding the entire array.

encodes a string, removing null/zero bytes (and separators '|') a zero byte is encoded as "\0", a '\' is encoded as "\\", sep is encoded as "\s" allows for easy double splitting (first on \x00, and next on "|").

returns base64 hash of data.

returns hex escaped string (\xNN for each byte).

minimum maxlen=6.

sentinel value for StrWithPos.Pos to indicate no position.