curl_free() is to be used for data allocated by
curl_easy_escape() or curl_easy_unescape() in libcurl.
This is unrelated to realloc/free in WriteMemoryCallback().
Copyright-holder and year information is extracted from git log.
git history begins in 2005. So (C) from 1998..2005 is lost. Also some
(C) assignment of commits where the committer didn't use --author.
