Squashed commit of the following:

- Dynamically fall back to PHP API functions to ensure API does always repond even if FTL is not runnung for some reason
- Update PHP API from current devel branch
- Increase flexibility in getQueryTypes API call
- Hide top ads list if nothing to display
- Proper display of activated privacy mode
- Remove spinner (would otherwise not be removed for zero results)
- Update tables every 10 seconds
- Update query types and forward destinations plots every 10 seconds
- More verbose output in top lists (total number next to percentage in tooltip)
- Implemented "recentBlocked" keyword for API
- Ensure compatibility with PHP5 version < 5.4
- Adjust output format of overTimeData10mins to comply with PHP API
- Further speedup of Query Log page by showing only the recent 10 minutes by default
- Hide temperature if FTL is not running and show FTL status
- Add information to Settings page
- Adjust error message when loading of query log failed
- Move processing of domainname, clientIP, clientname and time interval filters for the Query Log page to FTL for speed enhancement
- Generate link if pi.hole comes up in the Top Domains list
- Remove resolve DNS names option - this is now enabled by default (daemon will only do it once per day instead of PHP-API which did it on every reloading of the web interface)
- Add socket timeout of 10 seconds + modification to Settings page since FTL backend supports API_EXCLUDE_CLIENTS filtering with both IP addresses and host names (also mixed)
- Improved Query Log page

scripts/pi-hole/php/FTL.php

@@ -0,0 +1,103 @@
+<?php
+
+function testFTL()
+{
+	return (strpos(exec("ps -p `cat /var/run/pihole-FTL.pid` -o comm="), "pihole-FTL") !== false);
+}
+
+function connectFTL($address, $port=4711, $quiet=true)
+{
+	if(!$quiet)
+	{
+		echo "Attempting to connect to '$address' on port '$port'...\n";
+	}
+
+	if($address == "127.0.0.1")
+	{
+		// Read port
+		$portfile = file_get_contents("/var/run/pihole-FTL.port");
+		if(is_numeric($portfile))
+			$port = intval($portfile);
+	}
+
+	// Create a TCP/IP socket
+	$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP)
+	or die("socket_create() failed: reason: " . socket_strerror(socket_last_error()) . "\n");
+
+	$result = socket_connect($socket, $address, $port)
+	or die("socket_connect() failed.\nReason: ($result) " . socket_strerror(socket_last_error($socket)) . "\n");
+
+	// Set timeout to 10 seconds
+	socket_set_option($socket, SOL_SOCKET, SO_RCVTIMEO, ['sec'=>10, 'usec'=>0]);
+	socket_set_option($socket, SOL_SOCKET, SO_SNDTIMEO, ['sec'=>10, 'usec'=>0]);
+
+	if(!$quiet)
+	{
+		echo "Success!\n\n";
+	}
+
+	return $socket;
+}
+function sendRequestFTL($requestin, $quiet=true)
+{
+	global $socket;
+
+	$request = ">".$requestin;
+	if(!$quiet)
+	{
+		echo "Sending request (".$request.")...\n";
+	}
+
+	socket_write($socket, $request, strlen($request)) or die("Could not send data to server\n");
+	if(!$quiet)
+	{
+		echo "OK.\n";
+	}
+}
+
+function getResponseFTL($quiet=true)
+{
+	global $socket;
+	if(!$quiet)
+	{
+		echo "Reading response:\n";
+	}
+
+	$response = [];
+
+	while(true)
+	{
+		$out = socket_read($socket, 2048, PHP_NORMAL_READ);
+		if(!$quiet)
+		{
+			echo $out;
+		}
+		if(strrpos($out,"---EOM---") !== false)
+		{
+			break;
+		}
+		$out = rtrim($out);
+		if(strlen($out) > 0)
+		{
+			$response[] = $out;
+		}
+	}
+
+	return $response;
+}
+
+function disconnectFTL($quiet=true)
+{
+	global $socket;
+	if(!$quiet)
+	{
+		echo "Closing socket...";
+	}
+
+	socket_close($socket);
+
+	if(!$quiet)
+	{
+		echo "OK.\n\n";
+	}
+}