can't detect utf-16 and utf-32

[Joungkyun]

can't detect utf-16 and utf-32

[Joungkyun]

The cause of this bug is because detect and detect_handledata APIs are not binary safe.

These APIs used strlen() internally. If given strings are UTF-16 or UTF-32 that has BOM code, binary safe problem occurs.

To fix this problems, change prototype of these APIs as follows:

CHARDET_API short detect_handledata (Detect *, const char *, size_t, DetectObj *)

However, for comaptibility with old version, add new detect_handledata_r and detect_r APIs

So, don't use detect and detect_handledata APIs and replace to detect_r or detect_handledata_r.