Fix client_cert and client_key option.
Fix client_cert and client_key option.

PericlesTheo/typhoeus,tompscanlan/typhoeus,nevans/typhoeus,EddyLuten/typhoeus,kkirsche/typhoeus,telekomatrix/typhoeus,bitgal/typhoeus,nju520/typhoeus,t3hpr1m3/typhoeus,AvnerCohen/typhoeus,wcmonty/typhoeus,pravi/typhoeus,typhoeus/typhoeus,sportngin/typhoeus,tinfoil/typhoeus