3790425 - sldreg registration via proxy fails with ssl handshake error

When triggering sldreg via proxy the following errors are noticed in the sldreg_http_trace log:

SSL_get_state()=="TLS read server hello A"
*** ERROR during SecuSSL_SessionStart() from SSL_connect()==SSL_ERROR_CONNECTION_LOST

SSL3 client handshake failed [<XXXXX>: Upon start of handshake: Failed to read any handshake message.]"

 Failed to open HTTP connection!

 HttpRequest::connect FAILED ... <Port>"

SLD registration program sldreg[.exe]

sldreg, sld registration,, proxy, https via proxy, ssl handshake, ssl3 client handshake failed, 0xA0600249, SSL_ERROR_CONNECTION_LOST, slddest.cfg, sldreg_http_trace, SAPSSLC.pse, tls, sni, commoncryptolib , KBA , BC-CCM-SLD-REG , SLD registration utility sldreg[.exe] , Problem