Basic implementation of TLS for memcached.1.5.13

Most of the work done by Tharanga. Some commits squashed in by
dormando. Also reviewed by dormando.

Tested, working, but experimental implementation of TLS for memcached.

Enable with ./configure --enable-tls

Requires OpenSSL 1.1.0 or better.

See `memcached -h` output for usage.

1 files changed, 2 insertions, 2 deletions

diff --git a/crawler.c b/crawler.c
index a1a5ead..e30d09b 100644
--- a/crawler.c
+++ b/crawler.c
@@ -293,7 +293,7 @@ static int lru_crawler_poll(crawler_client_t *c) {
 
     if (to_poll[0].revents & POLLIN) {
         char buf[1];
-        int res = read(c->sfd, buf, 1);
+        int res = ((conn*)c->c)->read(c->c, buf, 1);
         if (res == 0 || (res == -1 && (errno != EAGAIN && errno != EWOULDBLOCK))) {
             lru_crawler_close_client(c);
             return -1;
@@ -304,7 +304,7 @@ static int lru_crawler_poll(crawler_client_t *c) {
             lru_crawler_close_client(c);
             return -1;
         } else if (to_poll[0].revents & POLLOUT) {
-            int total = write(c->sfd, data, data_size);
+            int total = ((conn*)c->c)->write(c->c, data, data_size);
             if (total == -1) {
                 if (errno != EAGAIN && errno != EWOULDBLOCK) {
                     lru_crawler_close_client(c);