Fixes crash when cloning a profile.

https://retrace.fedoraproject.org/faf/problems/1433130/
https://bugzilla.gnome.org/show_bug.cgi?id=724264
(cherry picked from commit 512e4bbf)

Conflicts:
	src/terminal-settings-list.c

(cherry picked from commit 3de42647)

(cherry picked from commit d37f22f1)

https://bugzilla.redhat.com/show_bug.cgi?id=1040713
(cherry picked from commit c089b058)
(cherry picked from commit 13842c2e)

Fixes https://bugzilla.gnome.org/show_bug.cgi?id=708198 and
https://bugzilla.redhat.com/show_bug.cgi?id=1036374 .

(cherry picked from commit ac62dbbd)

Since it's just using this one header from libgsystem for now, just copy the
header file instead of using a git submodule.

(cherry picked from commit e9cab814)
(cherry picked from commit 52836747)

Victor Ibragimov authored Sep 16, 2013 and Piotr Drąg committed Sep 16, 2013

https://mail.gnome.org/archives/gnome-i18n/2013-September/msg00142.html

This fixes a crash introduced in commit 9f2ba3d5.

https://bugzilla.gnome.org/show_bug.cgi?id=706349
(cherry picked from commit ea9e7177)

https://retrace.fedoraproject.org/faf/problems/1137333/
https://retrace.fedoraproject.org/faf/problems/1003772/
https://bugzilla.redhat.com/show_bug.cgi?id=977010
(cherry picked from commit 9f2ba3d5)

It remains visible in the profile's preferences; one place showing it is enough.

https://bugzilla.gnome.org/show_bug.cgi?id=704097
(cherry picked from commit 82c5a627)

==24616== 18 bytes in 1 blocks are definitely lost in loss record 1,572 of 4,602
==24616==    at 0x402A059: malloc (vg_replace_malloc.c:263)
==24616==    by 0x4F4FD41: g_malloc (gmem.c:104)
==24616==    by 0x4F5006D: g_malloc_n (gmem.c:345)
==24616==    by 0x4F69E40: g_strdup (gstrfuncs.c:364)
==24616==    by 0x4DC2ADC: g_local_file_get_path (glocalfile.c:334)
==24616==    by 0x4CEB7A5: g_file_get_path (gfile.c:507)
==24616==    by 0x804DEBC: option_load_config_cb (terminal-options.c:583)
(cherry picked from commit 4f39be35)

https://bugzilla.redhat.com/show_bug.cgi?id=981440
(cherry picked from commit c06c94be)

(cherry picked from commit ac2ef407)

Tomáš Bžatek authored Aug 02, 2011 and Christian Persch committed Jun 08, 2013

Properly handle links like
http://foo.bar/path/with/a/colon:foo

This patch also avoids selecting trailing colon.

https://bugzilla.gnome.org/show_bug.cgi?id=640727
(cherry picked from commit 1eb9a828)

https://bugzilla.redhat.com/show_bug.cgi?id=968140
(cherry picked from commit e7a9bc94)

Make sure not to inherit the server's environment into the terminal child
processes, but instead only the environment as passed from the client.
(cherry picked from commit aaa515ee)

Since vte already does this, there is no point in doing it before as well.
(cherry picked from commit e74c3e3f)

https://bugzilla.redhat.com/show_bug.cgi?id=966713
(cherry picked from commit 8cd6fb6a)