Update wp-plugin-search.php

Security Fixes.

Changed: 
curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, true );
curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, true );

To:
curl_setopt( $handle, CURLOPT_SSL_VERIFYHOST, 2 );
curl_setopt( $handle, CURLOPT_SSL_VERIFYPEER, 1 );

Reference:
http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTSSLVERIFYHOST
http://curl.haxx.se/libcurl/c/curl_easy_setopt.html#CURLOPTSSLVERIFYPEER