haproxy: Update HAProxy to v2.0.0 (LTS)

- Update haproxy download URL and hash
- Add new patches
- Add several CFLAGS (derived from haproxy Makefile) to make the build work with v1.9+
- Update default configuration
- Add check-command (for config) to init-script
- Add prometheus-service from contribs by default
- Add support for uclibc to haproxy with libcrypt disabled
- Minor cleanups

I have been running v2.0 for some time now and it feels as stable as v1.8. v2.0 is the new LTS release.

Signed-off-by: Christian Lachner <gladiac@gmail.com>

net/haproxy/files/haproxy.cfg

@@ -1,6 +1,6 @@
-# Example configuration file for HAProxy 1.3, refer to the url below for
+# Example configuration file for HAProxy 2.0, refer to the url below for
 # a full documentation and examples for configuration:
-# http://haproxy.1wt.eu/download/1.3/doc/configuration.txt
+# https://cbonte.github.io/haproxy-dconv/2.0/configuration.html
 
 
 # Global parameters
@@ -38,6 +38,13 @@ global
 	# limits like number of open file descriptors. Default is 1.
 	#nbproc 2
 
+# Default parameters
+defaults
+	# Default timeouts
+	timeout connect 5000ms
+	timeout client 50000ms
+	timeout server 50000ms
+
 
 # Example HTTP proxy listener
 listen my_http_proxy
@@ -78,9 +85,9 @@ listen my_smtp_proxy
 	# Round robin load balancing over two servers on port 123 forcing
 	# the address 192.168.1.1 and port 25 as source.
 	balance roundrobin
-  #use next line for transparent proxy, so the servers can see the 
-  #original ip-address and remove source keyword in server definition
-  #source 0.0.0.0 usesrc clientip
+	#use next line for transparent proxy, so the servers can see the 
+	#original ip-address and remove source keyword in server definition
+	#source 0.0.0.0 usesrc clientip
 	server server01 192.168.1.10:123 source 192.168.1.1:25
 	server server02 192.168.1.20:123 source 192.168.1.1:25
 	

net/haproxy/files/haproxy.hotplug

@@ -1,7 +1,6 @@
 #!/bin/sh
 
 if [ "$ACTION" = add ]; then
-
 	/etc/init.d/haproxy enabled && \
 		/etc/init.d/haproxy start
 fi

net/haproxy/files/haproxy.init

@@ -5,6 +5,7 @@ START=99
 STOP=80
 
 SERVICE_USE_PID=1
+EXTRA_COMMANDS="check"
 
 HAPROXY_BIN="/usr/sbin/haproxy"
 HAPROXY_CONFIG="/etc/haproxy.cfg"
@@ -20,6 +21,9 @@ stop() {
 }
 
 reload() {
-	$HAPROXY_BIN -D -q -f $HAPROXY_CONFIG -p $HAPROXY_PID -sf $(cat $HAPROXY_PID | tr "\n" " ")	
-	#$HAPROXY_BIN -D -q -f $HAPROXY_CONFIG -p $HAPROXY_PID -sf $(cat $HAPROXY_PID)
+	$HAPROXY_BIN -D -q -f $HAPROXY_CONFIG -p $HAPROXY_PID -sf $(cat $HAPROXY_PID)
+}
+
+check() {
+        $HAPROXY_BIN -c -q -V -f $HAPROXY_CONFIG
 }