Update to debian:bullseye-slim for 2.2+

Older versions have not been adjusted to prefer stability. The EOL of HAProxy
2.0 nicely matches up the EOL of Debian Buster LTS and thus was choosen as the
cut-off point.

Author: TimWolla

2.2/Dockerfile

@@ -22,28 +22,28 @@
   },
   "2.2": {
     "alpine": "3.14",
-    "debian": "buster-slim",
+    "debian": "bullseye-slim",
     "sha256": "b81e03a181070d1f7bcdaeec9f09af701fb1ab015c3c9c997a881f4773e29375",
     "url": "https://www.haproxy.org/download/2.2/src/haproxy-2.2.16.tar.gz",
     "version": "2.2.16"
   },
   "2.3": {
     "alpine": "3.14",
-    "debian": "buster-slim",
+    "debian": "bullseye-slim",
     "sha256": "c651a44f1a1158085962ea64852ab163e0d21c5ef0ea4b2c5218728ed4dbe257",
     "url": "https://www.haproxy.org/download/2.3/src/haproxy-2.3.13.tar.gz",
     "version": "2.3.13"
   },
   "2.4": {
     "alpine": "3.14",
-    "debian": "buster-slim",
+    "debian": "bullseye-slim",
     "sha256": "ce479380be5464faa881dcd829618931b60130ffeb01c88bc2bf95e230046405",
     "url": "https://www.haproxy.org/download/2.4/src/haproxy-2.4.3.tar.gz",
     "version": "2.4.3"
   },
   "2.5-rc": {
     "alpine": "3.14",
-    "debian": "buster-slim",
+    "debian": "bullseye-slim",
     "sha256": "9ca0bff5255ccadb42834785097cd380694dc087af6f6556585a979ddf470966",
     "url": "https://www.haproxy.org/download/2.5/src/devel/haproxy-2.5-dev4.tar.gz",
     "version": "2.5-dev4"

2.3/Dockerfile

@@ -12,9 +12,11 @@ else
 fi
 versions=( "${versions[@]%/}" )
 
-defaultDebianSuite='buster-slim'
+defaultDebianSuite='bullseye-slim'
 declare -A debianSuite=(
-	#[1.6]='stretch-slim'
+	[1.7]='buster-slim'
+	[1.8]='buster-slim'
+	[2.0]='buster-slim'
 )
 defaultAlpineVersion='3.14'
 declare -A alpineVersion=(