Consider CURLE_SEND_ERROR semi-fatal
Consider CURLE_SEND_ERROR semi-fatal

  TLS downloads tunneled through proxies fatally fail on occasion with:
  (55: SSL_write() returned SYSCALL, errno = 32).

  So we demote CURLE_SEND_ERROR(55) to semi-fatal.

Signed-off-by: Mohammad Alsaleh <6c225a8dcf0f3ea8ab31a8a88dea0c937d544fc7@gmail.com>

saldl/saldl,saldl/saldl,saldl/saldl