add some more test messages
workaround glib bug
drop gmime-2.4 support from debian packaging
fix potential buffer overflow
audit buffer overrun
3.1.16
fix regression in boundary scanning and test-suite
put gmime back in charge of boundary scanning
Merge tag 'v3.1.16' into autotools

Conflicts:
- dropped libgmime-2.4-dev from build dependencies
	debian/control
- deleted generated files
	Makefile.in
	aclocal.m4
	configure
	man/Makefile.in
	src/Makefile.in
	src/modules/Makefile.in
	test/Makefile.in
Update Debian changelog to 3.1.16-1
3.1.17
Merge tag 'v3.1.17' into autotools
Update Debian changelog to 3.1.17-1