Add a high-speed bypass for the NGQP for the common case of a simply query

with quality constraints that outputs a single row.

FossilOrigin-Name: 8d1ba309211e8afa8be5520bbc1eecf6deacae07

diff --cc manifest
index d0734bd638cb5ae039f7c83a5ac7275a52cac061,7682ff8ad25a427e0d812653d510a88288f3b24a..914fd840784ed5ac4dcb9de20b8068aa3d80020d
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Must\sfaster\scomputation\sof\sestimated\slogarithm.
- D 2013-06-07T02:04:19.774
 -C Minor\sproblems\sin\sthe\shigh-speed\sNGQP\sfixed.
 -D 2013-06-10T12:15:47.024
++C Add\sa\shigh-speed\sbypass\sfor\sthe\sNGQP\sfor\sthe\scommon\scase\sof\sa\ssimply\squery\nwith\squality\sconstraints\sthat\soutputs\sa\ssingle\srow.
++D 2013-06-10T12:17:03.683
  F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
  F Makefile.in 5e41da95d92656a5004b03d3576e8b226858a28e
  F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@@ -1094,7 -1094,7 +1094,7 @@@ F tool/vdbe-compress.tcl f12c884766bd14
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh fbc018d67fd7395f440c28f33ef0f94420226381
  F tool/win/sqlite.vsix 97894c2790eda7b5bce3cc79cb2a8ec2fde9b3ac
- P 02741d177bfc2fca23bc99974cd899eba13cb59a
- R 8ee17766ef9ac6851fd1329c34593963
 -P db2415fa677b84cd0f6dd424283c94e98d246e3b
++P dfbca3acaeb862f24f25e7810a16ff2066111ff4 20eeccf1f24dd762f1bee9c3fe628c70ff01627f
+ R 1c99bcc201a3fe7c000749ac05c30a32
  U drh
- Z adf16c6d5fc0c897d258a12782d83ad0
 -Z f1d76f2fd1cf61ecde305cf79590397b
++Z f19cc889e5aa39da8409c75eaebc0bb3

diff --cc manifest.uuid
index 8ae2ff38a7d429dc55e88ea75629d9d5891c95b9,6bd8b33dc7f1dabc6875d25933018e417a83e690..493af6828644b1908251e2e3bb7d6eb27124ac47
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- dfbca3acaeb862f24f25e7810a16ff2066111ff4
 -20eeccf1f24dd762f1bee9c3fe628c70ff01627f
++8d1ba309211e8afa8be5520bbc1eecf6deacae07