EPIC

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# $EPIC: urldecode.txt,v 1.4 2009/08/29 23:21:45 jnelson Exp $
======Synopsis:======
$__urldecode__(<url-encoded-text>)

======Technical:======
This function performs the reverse-rfc3986 transformation on 
<url-encoded-text>.  Each byte of input in <url-encoded-text> is 
copied to the output, except that when the 0x25 value ("%") is found
followed by two hexidecimal digits (0-9 or A-F), those three
characters are converted into the corresponding byte.

For example, "%20" in the <url-encoded-text> is replaced with a space.

Unfortunately, because everything in the client is done as a C string, if
the <url-encoded-text> contains a nul, or an encoded nul ("%00"), you won't
see any data after that point.

This function has been superceded by [[xform]] which has a URL transform.

======Practical:======
This can be used to de-mangle text that has been passed through 
$[[urlencode]]().

======Returns:======
The input <url-encoded-text> with url-encoded-sequences substituted 
for the equivalent punctuation mark.