Enhance the VACUUM command so that it can operate on an attached database.

FossilOrigin-Name: 083f9e6270fa4faa402b91231271da4f3915c79f

diff --cc manifest
index d69c4a6a0444187b6a631b49a9536ff31c908ad6,1f7557a84d48964be5657a6959eee7a64b7de570..2c686caa9b5d42b8978a638a80ddb5b7d5cce7dc
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Change\sthe\sname\sof\sDb.zName\sto\sDb.zDbSName\sfor\simproved\slong-term\scode\nmaintainability.
- D 2016-08-18T22:19:03.467
 -C Disable\srow\scounting\son\squeries\srun\swhile\sdoing\sa\sVACUUM.
 -D 2016-08-19T15:12:38.157
++C Enhance\sthe\sVACUUM\scommand\sso\sthat\sit\scan\soperate\son\san\sattached\sdatabase.
++D 2016-08-19T15:15:55.612
  F Makefile.in cfd8fb987cd7a6af046daa87daa146d5aad0e088
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc d66d0395c38571aab3804f8db0fa20707ae4609a
@@@ -1510,8 -1511,7 +1511,8 @@@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a9
  F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
  F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
  F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
- P a861713cc6a3868a1c89240e8340bc7b2b9559da d7cf423cdccada2b0a4b7cc79ccf5f35d6f43212
- R 448d737617983f02db48ab96b9c54357
- T +closed d7cf423cdccada2b0a4b7cc79ccf5f35d6f43212
 -P 29d63059b4d2bb612523ac55ebfef040d054a64f
++P cb9865e14db1c0076618f13400151112f84960cb ad35ef116296e5d6aaeb9ef260bf35bee3bd6d20
+ R abd29f9f3d87c2af53d085425233b2a6
++T +closed ad35ef116296e5d6aaeb9ef260bf35bee3bd6d20
  U drh
- Z 152d854e5f3b61891883eac72f93d117
 -Z 5800f169232e621dbe2100315fb2f1aa
++Z a6de375e7bb722769082d6e640b9c49b

diff --cc manifest.uuid
index 86f4d39538e0974ece3c021bd8dc5d834a238d8d,bc4fefd82a0bd3dcf53aa6f49a0183d085813198..4e9d48c81e556bd04a4d5b82df5a69b78f2bbe75
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- cb9865e14db1c0076618f13400151112f84960cb
 -ad35ef116296e5d6aaeb9ef260bf35bee3bd6d20
++083f9e6270fa4faa402b91231271da4f3915c79f