Add method to configure trust anchors

Author: pennam

src/BearSSLClient.h

@@ -67,6 +67,7 @@ class BearSSLClient : public Client {
 
   inline void setClient(Client& client) { _client = &client; }
   inline void setProfile(void(*client_init_function)(br_ssl_client_context *cc, br_x509_minimal_context *xc, const br_x509_trust_anchor *trust_anchors, size_t trustrust_anchorst_anchors_num)) { _br_ssl_client_init_function = client_init_function; }
+  inline void setTrustAnchors(const br_x509_trust_anchor* myTAs, int myNumTAs) { _TAs = myTAs; _numTAs = myNumTAs; }
 
   virtual int connect(IPAddress ip, uint16_t port);
   virtual int connect(const char* host, uint16_t port);