haproxy: Update HAProxy to v2.0.5

- Update haproxy download URL and hash
- Add new patches

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

net/haproxy/patches/001-MINOR-tools-add-append_prefixed_str.patch

@@ -0,0 +1,75 @@
+commit fe575b5ca645d6751fba56efa907952eda200b09
+Author: Willy Tarreau <w@1wt.eu>
+Date:   Wed Aug 21 13:17:37 2019 +0200
+
+    MINOR: tools: add append_prefixed_str()
+    
+    This is somewhat related to indent_msg() except that this one places a
+    known prefix at the beginning of each line, allows to replace the EOL
+    character, and not to insert a prefix on the first line if not desired.
+    It works with a normal output buffer/chunk so it doesn't need to allocate
+    anything nor to modify the input string. It is suitable for use in multi-
+    line backtraces.
+    
+    (cherry picked from commit a2c9911ace8537e0a350daf8d981170a001b6c7a)
+    [wt: backported to improve troubleshooting when the watchdog fires]
+    Signed-off-by: Willy Tarreau <w@1wt.eu>
+
+diff --git a/include/common/standard.h b/include/common/standard.h
+index 0f4b1870..cdefc9f5 100644
+--- a/include/common/standard.h
++++ b/include/common/standard.h
+@@ -1238,6 +1238,7 @@ char *memprintf(char **out, const char *format, ...)
+  *   free(err);
+  */
+ char *indent_msg(char **out, int level);
++int append_prefixed_str(struct buffer *out, const char *in, const char *pfx, char eol, int first);
+ 
+ /* removes environment variable <name> from the environment as found in
+  * environ. This is only provided as an alternative for systems without
+diff --git a/src/standard.c b/src/standard.c
+index 2f205f74..717c14a9 100644
+--- a/src/standard.c
++++ b/src/standard.c
+@@ -3709,6 +3709,41 @@ char *indent_msg(char **out, int level)
+ 	return ret;
+ }
+ 
++/* makes a copy of message <in> into <out>, with each line prefixed with <pfx>
++ * and end of lines replaced with <eol> if not 0. The first line to indent has
++ * to be indicated in <first> (starts at zero), so that it is possible to skip
++ * indenting the first line if it has to be appended after an existing message.
++ * Empty strings are never indented, and NULL strings are considered empty both
++ * for <in> and <pfx>. It returns non-zero if an EOL was appended as the last
++ * character, non-zero otherwise.
++ */
++int append_prefixed_str(struct buffer *out, const char *in, const char *pfx, char eol, int first)
++{
++	int bol, lf;
++	int pfxlen = pfx ? strlen(pfx) : 0;
++
++	if (!in)
++		return 0;
++
++	bol = 1;
++	lf = 0;
++	while (*in) {
++		if (bol && pfxlen) {
++			if (first > 0)
++				first--;
++			else
++				b_putblk(out, pfx, pfxlen);
++			bol = 0;
++		}
++
++		lf = (*in == '\n');
++		bol |= lf;
++		b_putchr(out, (lf && eol) ? eol : *in);
++		in++;
++	}
++	return lf;
++}
++
+ /* removes environment variable <name> from the environment as found in
+  * environ. This is only provided as an alternative for systems without
+  * unsetenv() (old Solaris and AIX versions). THIS IS NOT THREAD SAFE.