Postfix: Update to 3.8.0

Please refer to https://www.postfix.org/announcements/postfix-3.8.0.html
for this versions' release announcement.

Signed-off-by: Peter Müller <peter.mueller@ipfire.org>

src/patches/postfix-3.6.2-glibc-234-build-fix.patch

@@ -1,14 +0,0 @@
-diff --git a/src/util/sys_defs.h b/src/util/sys_defs.h
-index 99bec9b..95c78ec 100644
---- a/src/util/sys_defs.h
-+++ b/src/util/sys_defs.h
-@@ -802,6 +803,9 @@ extern int initgroups(const char *, int);
- #define _PATH_PROCNET_IFINET6 "/proc/net/if_inet6"
- #endif
- #endif
-+#if HAVE_GLIBC_API_VERSION_SUPPORT(2, 34)
-+#define HAS_CLOSEFROM
-+#endif
- #include <linux/version.h>
- #if !defined(KERNEL_VERSION)
- #define KERNEL_VERSION(a,b,c) (LINUX_VERSION_CODE + 1)

src/patches/postfix/postfix-3.7.2-fix_linux6.patch

@@ -1,24 +0,0 @@
-diff -Naur postfix-3.7.2.org/makedefs postfix-3.7.2/makedefs
---- postfix-3.7.2.org/makedefs	2022-01-23 21:53:41.000000000 +0100
-+++ postfix-3.7.2/makedefs	2022-10-18 16:11:50.259575443 +0200
-@@ -627,7 +627,7 @@
- 		: ${SHLIB_ENV="LD_LIBRARY_PATH=`pwd`/lib"}
- 		: ${PLUGIN_LD="${CC-gcc} -shared"}
- 		;;
-- Linux.[345].*)	SYSTYPE=LINUX$RELEASE_MAJOR
-+ Linux.[3-6].*)	SYSTYPE=LINUX$RELEASE_MAJOR
- 		case "$CCARGS" in
- 		 *-DNO_DB*) ;;
- 		 *-DHAS_DB*) ;;
-diff -Naur postfix-3.7.2.org/src/util/sys_defs.h postfix-3.7.2/src/util/sys_defs.h
---- postfix-3.7.2.org/src/util/sys_defs.h	2021-12-05 19:59:27.000000000 +0100
-+++ postfix-3.7.2/src/util/sys_defs.h	2022-10-18 16:09:29.682371415 +0200
-@@ -751,7 +751,7 @@
-  /*
-   * LINUX.
-   */
--#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5)
-+#if defined(LINUX2) || defined(LINUX3) || defined(LINUX4) || defined(LINUX5) || defined(LINUX6)
- #define SUPPORTED
- #define UINT32_TYPE	unsigned int
- #define UINT16_TYPE	unsigned short