Add user configuration and password

backend/escl.conf.in

@@ -18,7 +18,7 @@
 
 #device http://123.456.789.10:8080 OptionalModel1
 #device https://123.456.789.10:443 "Optional Model 2"
-#device https://123.456.789.10:443 "HP Color LaserJet FlowMFP M578" "hack=localhost"
+#device https://user:password@123.456.789.10:443 "HP Color LaserJet FlowMFP M578" "hack=localhost"
 #device unix:/run/proxy.sock:http://123.456.789.10:80
 
 #[device]

backend/escl/escl.c

@@ -1135,6 +1135,7 @@ SANE_Status
 escl_parse_name(SANE_String_Const name, ESCL_Device *device)
 {
     SANE_String_Const host = NULL;
+    SANE_String_Const host2 = NULL;
     SANE_String_Const port_str = NULL;
     DBG(10, "escl_parse_name\n");
     if (name == NULL || device == NULL) {
@@ -1153,16 +1154,25 @@ escl_parse_name(SANE_String_Const name, ESCL_Device *device)
     if (strncmp(name, "https://", 8) == 0) {
         device->https = SANE_TRUE;
         device->type = strdup("https");
-        host = name + 8;
+        host2 = name + 8;
     } else if (strncmp(name, "http://", 7) == 0) {
         device->https = SANE_FALSE;
         device->type = strdup("http");
-        host = name + 7;
+        host2 = name + 7;
     } else {
         DBG(1, "Unknown URL scheme in %s", name);
         return SANE_STATUS_INVAL;
     }
 
+    host = strchr(host2, '@');
+    if (host) {
+        host++;
+	device->user_passwd  = strndup(host2, host - host2 - 1);
+    }
+    else {
+	host = host2;
+    }
+
     port_str = strchr(host, ':');
     if (port_str == NULL) {
         DBG(1, "Port missing from URL: %s", name);

backend/escl/escl.h

@@ -102,6 +102,7 @@ typedef struct ESCL_Device {
     SANE_Bool https;
     struct curl_slist *hack;
     char     *unix_socket;
+    char     *user_passwd;
 } ESCL_Device;
 
 typedef struct capst