[xml] libxml2 uri.c xmlURIEscape (with fix)

[Joel Young <jdy cs brown edu>]

Hi Daniel,

I found another issue with xmlURIEscape.  It doesn't handle blanks in
the input string.  I know blanks aren't valid but that's what
xmlURIEscape is s'posed to fix.

All that is needed to fix this is to add ' ' to IS_UNWISE in uri.c:

 #define IS_UNWISE(p)                                                    \
       (((*(p) == '{')) || ((*(p) == '}')) || ((*(p) == '|')) ||         \
       ((*(p) == '\\')) || ((*(p) == '^')) || ((*(p) == '[')) ||        \
        ((*(p) == ']')) || ((*(p) == ' ')) || ((*(p) == '`')))  
 
                             ------------

What do you think?

Joel Young
jdy cs brown edu