config.mak.in: remove unused definitions

When 5566771 (autoconf: Use autoconf to write installation
directories to config.mak.autogen, 2006-07-03) introduced support
for autoconf generated config.mak file, it added an "export" for a
few common makefile variables, in addition to definitions of srcdir
and VPATH.

The "export" logically does not belong there.  The make variables
like mandir, prefix, etc, should be exported to submakes for people
who use config.mak and people who use config.mak.autogen the same
way; if we want to get these exported, that should be in the main
Makefile.

We do use mandir and htmldir in Documentation/Makefile, so let's
add export for them in the main Makefile instead.

We may eventually want to support VPATH, and srcdir may turn out to
be useful for that purpose, but right now nobody uses it, so it is
useless to define them in this file.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Merge branch 'ab/gitweb-use-same-scheme'

Avoid mixed contents on a page coming via http and https when
gitweb is hosted on a https server.

* ab/gitweb-use-same-scheme:
  gitweb: refer to picon/gravatar images over the same scheme
Merge branch 'jk/python-styles'

* jk/python-styles:
  CodingGuidelines: add Python coding guidelines
Merge branch 'sb/gpg-i18n'

* sb/gpg-i18n:
  gpg: allow translation of more error messages
Merge branch 'nd/branch-error-cases'

Fix various error messages and conditions in "git branch", e.g. we
advertised "branch -d/-D" to remove one or more branches but actually
implemented removal of zero or more branches---request to remove no
branches was not rejected.

* nd/branch-error-cases:
  branch: let branch filters imply --list
  docs: clarify git-branch --list behavior
  branch: mark more strings for translation
  branch: give a more helpful message on redundant arguments
  branch: reject -D/-d without branch name
Merge branch 'sb/run-command-fd-error-reporting'

* sb/run-command-fd-error-reporting:
  run-command: be more informative about what failed
Merge branch 'jk/remote-helpers-doc'

"git help remote-helpers" did not work; 'remote-helpers' is not
a subcommand name but a concept, so its documentation should have
been in gitremote-helpers, not git-remote-helpers.

* jk/remote-helpers-doc:
  Rename {git- => git}remote-helpers.txt
Merge branch 'jk/doc-makefile-cleanup'

* jk/doc-makefile-cleanup:
  Documentation/Makefile: clean up MAN*_TXT lists
Merge branch 'jk/mergetool'

Cleans up mergetool/difftool combo.

* jk/mergetool:
  mergetools: simplify how we handle "vim" and "defaults"
  mergetool--lib: don't call "exit" in setup_tool
  mergetool--lib: improve show_tool_help() output
  mergetools/vim: remove redundant diff command
  git-difftool: use git-mergetool--lib for "--tool-help"
  git-mergetool: don't hardcode 'mergetool' in show_tool_help
  git-mergetool: remove redundant assignment
  git-mergetool: move show_tool_help to mergetool--lib
Merge branch 'ss/mergetools-tortoise'

Update mergetools to work better with newer merge helper tortoise ships.

* ss/mergetools-tortoise:
  mergetools: teach tortoisemerge to handle filenames with SP correctly
  mergetools: support TortoiseGitMerge
Merge branch 'da/mergetool-docs'

Build on top of the clean-up done by jk/mergetool and automatically
generate the list of mergetool and difftool backends the build
supports to be included in the documentation.

* da/mergetool-docs:
  doc: generate a list of valid merge tools
  mergetool--lib: list user configured tools in '--tool-help'
  mergetool--lib: add functions for finding available tools
  mergetool--lib: improve the help text in guess_merge_tool()
  mergetool--lib: simplify command expressions
Merge branch 'jn/auto-depend-workaround-buggy-ccache' into maint

Buggy versions of ccache broke the auto-generation of dependencies.

* jn/auto-depend-workaround-buggy-ccache:
  Makefile: explicitly set target name for autogenerated dependencies
Merge branch 'jc/fake-ancestor-with-non-blobs' into maint

Rebasing the history of superproject with change in the submodule
has been broken since v1.7.12.

* jc/fake-ancestor-with-non-blobs:
  apply: diagnose incomplete submodule object name better
  apply: simplify build_fake_ancestor()
  git-am: record full index line in the patch used while rebasing
Merge branch 'sb/gpg-plug-fd-leak' into maint

We forgot to close the file descriptor reading from "gpg" output,
killing "git log --show-signature" on a long history.

* sb/gpg-plug-fd-leak:
  gpg: close stderr once finished with it in verify_signed_buffer()
Merge branch 'ft/transport-report-segv' into maint

A failure to push due to non-ff while on an unborn branch
dereferenced a NULL pointer when showing an error message.

* ft/transport-report-segv:
  push: fix segfault when HEAD points nowhere
Merge branch 'jc/do-not-let-random-file-interfere-with-completion-tests' into maint

Scripts to test bash completion was inherently flaky as it was
affected by whatever random things the user may have on $PATH.

* jc/do-not-let-random-file-interfere-with-completion-tests:
  t9902: protect test from stray build artifacts
Merge branch 'nd/fix-perf-parameters-in-tests' into maint

* nd/fix-perf-parameters-in-tests:
  test-lib.sh: unfilter GIT_PERF_*
Merge branch 'mz/pick-unborn' into maint

"git cherry-pick" did not replay a root commit to an unborn branch.

* mz/pick-unborn:
  learn to pick/revert into unborn branch
  tests: move test_cmp_rev to test-lib-functions
Git 1.8.1.3

Signed-off-by: Junio C Hamano <gitster@pobox.com>
Sync with 1.8.1.3