Unknown option: "-3" Unix manual page for CURLOPT_PROXY_KEYPASSWD. (host=minya system=Darwin)
CURLOPT_PROXY_KEYPASSWD(3) curl_easy_setopt options CURLOPT_PROXY_KEYPASSWD(3)

NAME
       CURLOPT_PROXY_KEYPASSWD - set passphrase to proxy private key

SYNOPSIS
       #include <curl/curl.h>

       CURLcode  curl_easy_setopt(CURL  *handle, CURLOPT_PROXY_KEYPASSWD, char
       *pwd);

DESCRIPTION
       This option is for connecting to a HTTPS proxy, not a HTTPS server.

       Pass a pointer to a zero terminated string as  parameter.  It  will  be
       used  as  the password required to use the CURLOPT_PROXY_SSLKEY(3) pri-
       vate key.  You never needed a pass phrase to load a certificate but you
       need one to load your private key.

       The  application  does not have to keep the string around after setting
       this option.

DEFAULT
       NULL

PROTOCOLS
       Used with HTTPS proxy

EXAMPLE
       TODO

AVAILABILITY
       Added in 7.52.0

RETURN VALUE
       Returns CURLE_OK  if  TLS  enabled,  CURLE_UNKNOWN_OPTION  if  not,  or
       CURLE_OUT_OF_MEMORY if there was insufficient heap space.

SEE ALSO
       CURLOPT_PROXY_SSLKEY(3),      CURLOPT_SSH_PRIVATE_KEYFILE(3),      CUR-
       LOPT_SSLKEY(3),

libcurl 7.54.0                 December 21, 2016    CURLOPT_PROXY_KEYPASSWD(3)