Log Message:
textproc: Add uchardet

uchardet is an encoding detector library, which takes a sequence of bytes
in an unknown character encoding without any additional information, and
attempts to determine the encoding of the text. Returned encoding names are
iconv-compatible.

uchardet started as a C language binding of the original C++ implementation
of the universal charset detection library by Mozilla. It can now detect
more charsets, and more reliably than the original implementation.