Issue title: http-server.c CloseHandle(d) raise exception which shoud be FindClose(d)
 Issue body: http-server.c line 280

handle return by FindFirstFile FindNextFile shoud be closed by FindClose

First-chance exception at 0x00007FF82F5999BA (ntdll.dll) in http-server.exe: 0xC0000008: An invalid handle was specified.
Unhandled exception at 0x00007FF82F5999BA (ntdll.dll) in http-server.exe: 0xC0000008: An invalid handle was specified.

 Comments: 
 Comment 0: Should be fixed in patches-2.0 and master. Thanks!

{'source': 'GithubIssues', 'repo_name_with_owner': 'libevent/libevent', 'issue_id': 36544489, 'repo_stars': 9298.0}