Various fixes to help at least vala bindings, if not others.

Patch originally by Rico Tzschichholz <ricotz@ubuntu.com>

Fixes issue #97

* Fix g_mime_message_get_date ownership txfr GI annotation

The message owns the date (it's effectively a property), so don't
transfer ownership.

Fixes a critical in vala when using this object.

See GNOME/vala#986



* Add missing nullable GI annotations to GMimeMessage

These help out bindings for languages that care about nullability,
like vala.

Co-authored-by: Rico Tzschichholz <ricotz@ubuntu.com>

Added parser warnings for these cases.

When returning X.509 certificates for use with S/MIME, we depend on
the validity of the "user IDs" (subject, subjectAltName) in order to
populate the GMimeCertificate object.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

Fixes issue #89

Some keys may have multiple subkeys that can be used for signing
or encrypting. Just because one of them may have expired or may
be revoked doesn't mean they all are. Keep looking to see if
another subkey can be used insead.

Fixes issue #88

Added a section on memory management

May fix issue #81

Partial fix for issue #81

Fixes issue #82

* Added MSVC project for 'msgcheck' example program.

* Makefile.am for new VS2017 directory.

* Added VS2017 projects for library and example programs.

Fixes issue #78

Fixes issue #77

Michael Gratton authored Dec 26, 2019 and Jeffrey Stedfast committed Dec 25, 2019

This fixes "Creation method of abstract class cannot be public" warnings
when compiling with recent valac.

Since `g_mime_object_new[_type]` are effectively static factory methods
rather than constructors, suppress their use as ctors and bind using
custom static methods.

Daniel Kahn Gillmor authored Dec 09, 2019 and Jeffrey Stedfast committed Dec 09, 2019

The standard g_mime_{certificate,signature}_get_{created,expires}
functions return a time_t whose units are well-defined by the
operating system.

The new 64-bit accessors provide a gint64, which has no such implicit
definition, so GMime should be explicit about what it intends these
values to represent.

Signed-off-by: Daniel Kahn Gillmor <dkg@fifthhorseman.net>

Returns a 64bit representation of the timestamps.

Fixes issue #68

Eric Wong authored Nov 09, 2019 and Jeffrey Stedfast committed Nov 09, 2019

We can use a GQueue to emulate the behavior of an stack on the
heap.  This allows us to parse deeply nested MIME parts since
RLIMIT_STACK is typically only a few megabytes while typical
GNU/Linux systems can use all available virtual memory for the
heap.

Olly Betts authored Oct 19, 2019 and Jeffrey Stedfast committed Oct 18, 2019

Fixes error:
sed: -e expression #10, char 75: unknown option to `s'