Absolute vs Relative paths.
The log file line says it all: '/webalizer/index.html' doesn't exist, which
is not the path of the file you wanna serve...

Take a look at the following examples showing how 'location' address is
replaced or completed (depending on absolute or relative 'alias' directive)
by 'alias' path:
http://nginx.org/en/docs/http/ngx_http_core_module.html#alias
http://stackoverflow.com/questions/10084137/nginx-aliaslocation-directive

PEBCAD? ;o)
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*B. R.*
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