curl tool: reviewed code moved to tool_*.[ch] files my_setopt and my_setopt_str no longer ignores curl_easy_setopt result. Fixed some OOM handling issues.
curl tool: reviewed code moved to tool_*.[ch] files Overhauled FindWin32CACert()
curl tool: truly fix compiler warning
curl tool: fix compiler warning
curl tool: reviewed code moved to tool_*.[ch] files
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