Remove unnecessary apr_table_do() function casts
Function casts can cause hard-to-debug corruption issues if a declaration is accidentally changed to be incompatible. Luckily, most of the function casts for apr_table_do() calls are unnecessary. Remove them, and adjust the signatures for helpers that weren't taking void* as the first argument. The remaining helper that requires a cast is http_filter.c's form_header_field(), which is probably where many of these casts were copy-pasted from. I have left it as-is: it has other direct callers besides apr_table_do(), and it's already documented with warnings not to change the function signature. git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1769192 13f79535-47bb-0310-9956-ffa450edef68
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