This test asks for an impossible conversion to the system by
preparing an UTF-8 translation with characters that cannot be
expressed in ISO-8859-1, and then asking the message shown in
ISO-8859-1.  Even though the behaviour against such a request is
undefined, it may be interesting to see what the system does, and
the purpose of this test is to see if there are platforms that
exhibit behaviour that we haven't seen.

The original recognized two known modes of behaviour:

 - the key used to query the message catalog ("TEST: Old English
   Runes"), saying "I cannot do that i18n".
 - impossible characters replaced with ASCII "?", saying "I punt".

but they were treated totally differently.  The test simply issued
an informational message "Your system punts on this one" for the
first error mode, while it diagnosed the latter as "Your system is
good; you pass!".

It turns out that Mac OS X exhibits a third mode of error behaviour,
to spew out the raw value stored in the message catalog.  The test
diagnosed this behaviour as "broken", but it is merely trying to do
its best to respond to an impossible request by saying "I punt" in a
way that is slightly different from the second one.

Update the offending test to make it clear what is (and is not)
being tested, update the code structure so that newly discovered
error mode can easily be added to it later, and reword the message
that comes from a failing case to clarify that it is not the system
that is broken when it fails, but merely that the behaviour is not
something we have seen.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

Signed-off-by: Junio C Hamano <gitster@pobox.com>

* jc/doc-merge-options:
  Documentation/merge-options.txt: group "ff" related options together

* cn/maint-rev-list-doc:
  Documentation: use {asterisk} in rev-list-options.txt when needed

When running t9300, valgrind (correctly) complains about an
uninitialized value in write_crash_report:

  ==2971== Use of uninitialised value of size 8
  ==2971==    at 0x4164F4: sha1_to_hex (hex.c:70)
  ==2971==    by 0x4073E4: die_nicely (fast-import.c:468)
  ==2971==    by 0x43284C: die (usage.c:86)
  ==2971==    by 0x40420D: main (fast-import.c:2731)
  ==2971==  Uninitialised value was created by a heap allocation
  ==2971==    at 0x4C29B3D: malloc (vg_replace_malloc.c:263)
  ==2971==    by 0x433645: xmalloc (wrapper.c:35)
  ==2971==    by 0x405DF5: pool_alloc (fast-import.c:619)
  ==2971==    by 0x407755: pool_calloc.constprop.14 (fast-import.c:634)
  ==2971==    by 0x403F33: main (fast-import.c:3324)

Fix this by zeroing all of the 'struct tag'.  We would only need to
zero out the 'sha1' field, but this way seems more future-proof.

Signed-off-by: Thomas Rast <trast@student.ethz.ch>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Signed-off-by: Junio C Hamano <gitster@pobox.com>

* cn/maint-branch-with-bad:
  branch: don't assume the merge filter ref exists

Conflicts:
	t/t3200-branch.sh

* jn/maint-gitweb-invalid-regexp:
  gitweb: Handle invalid regexp in regexp search

* nd/maint-verify-objects:
  rev-list: fix --verify-objects --quiet becoming --objects
  rev-list: remove BISECT_SHOW_TRIED flag

* jk/maint-avoid-streaming-filtered-contents:
  do not stream large files to pack when filters are in use
  teach dry-run convert_to_git not to require a src buffer
  teach convert_to_git a "dry run" mode