Merge branch 'hv/submodule-alt-odb' into maint

When a submodule repository uses alternate object store mechanism, some
commands that were started from the superproject did not notice it and
failed with "No such object" errors.  The subcommands of "git submodule"
command that recursed into the submodule in a separate process were OK;
only the ones that cheated and peeked directly into the submodule's
repository from the primary process were affected.

By Heiko Voigt
* hv/submodule-alt-odb:
  teach add_submodule_odb() to look for alternates
tree: a1fbafe5fb22f2d96e782a0833b9c2b70c4aea31
  1. block-sha1/
  2. builtin/
  3. compat/
  4. contrib/
  5. Documentation/
  6. git-gui/
  7. git_remote_helpers/
  8. gitk-git/
  9. gitweb/
  10. mergetools/
  11. perl/
  12. po/
  13. ppc/
  14. t/
  15. templates/
  16. vcs-svn/
  17. xdiff/
  18. .gitattributes
  19. .gitignore
  20. .mailmap
  21. abspath.c
  22. aclocal.m4
  23. advice.c
  24. advice.h
  25. alias.c
  26. alloc.c
  27. archive-tar.c
  28. archive-zip.c
  29. archive.c
  30. archive.h
  31. argv-array.c
  32. argv-array.h
  33. attr.c
  34. attr.h
  35. base85.c
  36. bisect.c
  37. bisect.h
  38. blob.c
  39. blob.h
  40. branch.c
  41. branch.h
  42. builtin.h
  43. bulk-checkin.c
  44. bulk-checkin.h
  45. bundle.c
  46. bundle.h
  47. cache-tree.c
  48. cache-tree.h
  49. cache.h
  50. check-builtins.sh
  51. check-racy.c
  52. check_bindir
  53. color.c
  54. color.h
  55. combine-diff.c
  56. command-list.txt
  57. commit.c
  58. commit.h
  59. config.c
  60. config.mak.in
  61. configure.ac
  62. connect.c
  63. connected.c
  64. connected.h
  65. convert.c
  66. convert.h
  67. copy.c
  68. COPYING
  69. credential-cache--daemon.c
  70. credential-cache.c
  71. credential-store.c
  72. credential.c
  73. credential.h
  74. csum-file.c
  75. csum-file.h
  76. ctype.c
  77. daemon.c
  78. date.c
  79. decorate.c
  80. decorate.h
  81. delta.h
  82. diff-delta.c
  83. diff-lib.c
  84. diff-no-index.c
  85. diff.c
  86. diff.h
  87. diffcore-break.c
  88. diffcore-delta.c
  89. diffcore-order.c
  90. diffcore-pickaxe.c
  91. diffcore-rename.c
  92. diffcore.h
  93. dir.c
  94. dir.h
  95. editor.c
  96. entry.c
  97. environment.c
  98. exec_cmd.c
  99. exec_cmd.h
  100. fast-import.c
  101. fetch-pack.h
  102. fixup-builtins
  103. fmt-merge-msg.h
  104. fsck.c
  105. fsck.h
  106. generate-cmdlist.sh
  107. gettext.c
  108. gettext.h
  109. git-add--interactive.perl
  110. git-am.sh
  111. git-archimport.perl
  112. git-bisect.sh
  113. git-compat-util.h
  114. git-cvsexportcommit.perl
  115. git-cvsimport.perl
  116. git-cvsserver.perl
  117. git-difftool--helper.sh
  118. git-difftool.perl
  119. git-filter-branch.sh
  120. git-instaweb.sh
  121. git-lost-found.sh
  122. git-merge-octopus.sh
  123. git-merge-one-file.sh
  124. git-merge-resolve.sh
  125. git-mergetool--lib.sh
  126. git-mergetool.sh
  127. git-parse-remote.sh
  128. git-pull.sh
  129. git-quiltimport.sh
  130. git-rebase--am.sh
  131. git-rebase--interactive.sh
  132. git-rebase--merge.sh
  133. git-rebase.sh
  134. git-relink.perl
  135. git-remote-testgit.py
  136. git-repack.sh
  137. git-request-pull.sh
  138. git-send-email.perl
  139. git-sh-i18n.sh
  140. git-sh-setup.sh
  141. git-stash.sh
  142. git-submodule.sh
  143. git-svn.perl
  144. GIT-VERSION-GEN
  145. git-web--browse.sh
  146. git.c
  147. git.spec.in
  148. gpg-interface.c
  149. gpg-interface.h
  150. graph.c
  151. graph.h
  152. grep.c
  153. grep.h
  154. hash.c
  155. hash.h
  156. help.c
  157. help.h
  158. hex.c
  159. http-backend.c
  160. http-fetch.c
  161. http-push.c
  162. http-walker.c
  163. http.c
  164. http.h
  165. ident.c
  166. imap-send.c
  167. INSTALL
  168. kwset.c
  169. kwset.h
  170. levenshtein.c
  171. levenshtein.h
  172. LGPL-2.1
  173. list-objects.c
  174. list-objects.h
  175. ll-merge.c
  176. ll-merge.h
  177. lockfile.c
  178. log-tree.c
  179. log-tree.h
  180. mailmap.c
  181. mailmap.h
  182. Makefile
  183. match-trees.c
  184. merge-file.c
  185. merge-file.h
  186. merge-recursive.c
  187. merge-recursive.h
  188. name-hash.c
  189. notes-cache.c
  190. notes-cache.h
  191. notes-merge.c
  192. notes-merge.h
  193. notes.c
  194. notes.h
  195. object.c
  196. object.h
  197. pack-check.c
  198. pack-refs.c
  199. pack-refs.h
  200. pack-revindex.c
  201. pack-revindex.h
  202. pack-write.c
  203. pack.h
  204. pager.c
  205. parse-options-cb.c
  206. parse-options.c
  207. parse-options.h
  208. patch-delta.c
  209. patch-ids.c
  210. patch-ids.h
  211. path.c
  212. pkt-line.c
  213. pkt-line.h
  214. preload-index.c
  215. pretty.c
  216. progress.c
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  218. prompt.c
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  220. quote.c
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  222. reachable.c
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  224. read-cache.c
  225. README
  226. reflog-walk.c
  227. reflog-walk.h
  228. refs.c
  229. refs.h
  230. remote-curl.c
  231. remote.c
  232. remote.h
  233. replace_object.c
  234. rerere.c
  235. rerere.h
  236. resolve-undo.c
  237. resolve-undo.h
  238. revision.c
  239. revision.h
  240. run-command.c
  241. run-command.h
  242. send-pack.h
  243. sequencer.c
  244. sequencer.h
  245. server-info.c
  246. setup.c
  247. sh-i18n--envsubst.c
  248. sha1-array.c
  249. sha1-array.h
  250. sha1-lookup.c
  251. sha1-lookup.h
  252. sha1_file.c
  253. sha1_name.c
  254. shallow.c
  255. shell.c
  256. shortlog.h
  257. show-index.c
  258. sideband.c
  259. sideband.h
  260. sigchain.c
  261. sigchain.h
  262. strbuf.c
  263. strbuf.h
  264. streaming.c
  265. streaming.h
  266. string-list.c
  267. string-list.h
  268. submodule.c
  269. submodule.h
  270. symlinks.c
  271. tag.c
  272. tag.h
  273. tar.h
  274. test-chmtime.c
  275. test-credential.c
  276. test-ctype.c
  277. test-date.c
  278. test-delta.c
  279. test-dump-cache-tree.c
  280. test-genrandom.c
  281. test-index-version.c
  282. test-line-buffer.c
  283. test-match-trees.c
  284. test-mktemp.c
  285. test-parse-options.c
  286. test-path-utils.c
  287. test-run-command.c
  288. test-scrap-cache-tree.c
  289. test-sha1.c
  290. test-sha1.sh
  291. test-sigchain.c
  292. test-subprocess.c
  293. test-svn-fe.c
  294. thread-utils.c
  295. thread-utils.h
  296. trace.c
  297. transport-helper.c
  298. transport.c
  299. transport.h
  300. tree-diff.c
  301. tree-walk.c
  302. tree-walk.h
  303. tree.c
  304. tree.h
  305. unimplemented.sh
  306. unix-socket.c
  307. unix-socket.h
  308. unpack-trees.c
  309. unpack-trees.h
  310. upload-pack.c
  311. url.c
  312. url.h
  313. usage.c
  314. userdiff.c
  315. userdiff.h
  316. utf8.c
  317. utf8.h
  318. walker.c
  319. walker.h
  320. wrap-for-bin.sh
  321. wrapper.c
  322. write_or_die.c
  323. ws.c
  324. wt-status.c
  325. wt-status.h
  326. xdiff-interface.c
  327. xdiff-interface.h
  328. zlib.c