Changes in 7.71.1 - July 1 2020

Bugfixes:

• cirrus-ci: disable FreeBSD 13 (again)
• Curl_inet_ntop: always check the return code
• CURLOPT_READFUNCTION.3: provide the upload data size up front
• DYNBUF.md: fix a typo: trail => tail
• escape: make the URL decode able to reject only %00-bytes
• escape: zero length input should return a zero length output
• examples/multithread.c: call curl_global_cleanup()
• http2: set the correct URL in pushed transfers
• http: fix proxy auth with blank password
• mbedtls: fix build with disabled proxy support
• ngtcp2: sync with current master
• openssl: Fix compilation on Windows when ngtcp2 is enabled
• Revert "multi: implement wait using winsock events"
• sendf: improve the message on client write errors
• terminology: call them null-terminated strings
• tool_cb_hdr: Fix etag warning output and return code
• url: allow user + password to contain "control codes" for HTTP(S)
• vtls: compare cert blob when finding a connection to reuse

Further