* patches/gtk2-main_iteration:
  GTK2: Fixed a few more uses of g_main_iteration().

glib 2.36 deprecated some stuff that the gtk-2 headerfiles use.
So set GLIB_VERSION_MIN_REQUIRED to a version prior to
GLIB_VERSION_2_36 to inhibit the deprecation warnings.

Fixes some deprecation warnings.

* patches/mariadb-conc-509:
  Configure [Mysql]: Survive MariaDB Connector/C 3.2.1 and later (CONC-509).

MariaDB Connector/C 3.2.1 CONC-509 changed the value returned
from mysql_get_client_version(3) from MYSQL_VERSION_ID to
MARIADB_PACKAGE_VERSION_ID.

Fixes support for MariaDB from 2021-05-31 and later.

* patches/bug10058:
  Configure: Improved exit(3C) C99 check.

Do not add C declarations behind #ifdef __cplusplus; it breaks
C++ compilers...

Fixes #10058 even more.

* patches/bug10058:
  Configure: Changed approach to autoconf 2.59 C99 kludge.

Always prepending a #include <stdlib.h> caused several tests
(eg AC_HAVE_FUNC) to fail due to mismatching prototypes.

Now we instead use the _AC_PROG_CXX_EXIT_DECLARATION kludge
also for C.

Fixes fall out from the previous fix for #10058.

* patches/bug10058:
  Configure: Fix some quoting issues.

Fixes #10058.

* patches/bug10058:
  Configure: Improved support for C99 with autoconf 2.59 and earlier.

* patches/bug10074:
  Nettle.CCM: Fix handling of authenticated data of lengths 14-0xfeff.

Thanks to Joshua Rogers for the report and test vector.

Fixes #10074.

* patches/bug10075:
  Standards.ASN1.Decode: Set error mode on Stdio.Buffer.
  Prevent infinite loops when decoding incomplete data.

Throw errors on buffer underflow.

Thanks to Joshua Rogers for the report and test vectors.

Fixes #10075.

Modules in Pike 8.0 need to be syntax-compatible with all released
versions of Pike 8.0 (or at least Pike 8.0.232 and later).