Patch sigterm for version 1.17.0 too

* Adds the missing patchfile for 1.17.0, meaning sigterm is now
   correctly patched for that version too.
* Removes the "default" patchfiles directory and makes the
   per-version directories mandatory, so future releases can't
   accidentally forget to add a new patchfile.
* Removes the patchfile for pgbouncer 1.7 since that version is
   no longer built.

Closes #150.
Closes #168.

Changelog.md

@@ -1,5 +1,8 @@
 ## Unreleased
 
+## v0.12.0 (September 6, 2022)
+* Add missing `SIGTERM` patch for v1.17.0 (corrects shutdown behaviour on Heroku-22)
+
 ## v0.11.0 (June 20, 2022)
 * Update to pgbouncer v1.17.0 on Heroku-22, to fix OpenSSL 3 related crashes
 

support/patchfiles/1.13.0/0001-Disable-SIGTERM.patch → support/patchfiles/1.17.0/0001-Disable-SIGTERM.patch

@@ -1,13 +1,13 @@
---- src/main.c	2019-09-26 21:37:14.000000000 +0000
-+++ src/main.c	2020-03-20 20:43:20.876976754 +0000
-@@ -425,9 +425,7 @@
- 
+--- src/main.c
++++ src/main.c
+@@ -445,9 +445,7 @@
+
  static void handle_sigterm(evutil_socket_t sock, short flags, void *arg)
  {
 -	log_info("got SIGTERM, fast exit");
 -	/* pidfile cleanup happens via atexit() */
 -	exit(1);
 +	log_info("Got SIGTERM, ignoring!");
  }
- 
+
  static void handle_sigint(evutil_socket_t sock, short flags, void *arg)

support/pgbouncer-build

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-set -e
+set -euo pipefail
 
 PGBOUNCER_VERSION=${PGBOUNCER_VERSION-1.14.0}
 
@@ -18,7 +18,8 @@ if [ -d "/buildpack/support/patchfiles/${PGBOUNCER_VERSION}" ]
 then
 		PATCHFILES=$(find /buildpack/support/patchfiles/"${PGBOUNCER_VERSION}" -name '*.patch')
 else
-		PATCHFILES=$(find /buildpack/support/patchfiles/default -name '*.patch')
+		echo "Missing patchfiles directory for ${PGBOUNCER_VERSION}!" >&2
+		exit 1
 fi
 
 (