Improvements to comments. Store some extra information in SqliteThread that

is useful for debugging.

FossilOrigin-Name: 9fb5e212089d85cdd3b4787dd69c72e6d84560b6

manifest

@@ -1,5 +1,5 @@
-C Merge\sall\srecent\strunk\schanges\sinto\sthe\sthreads\sbranch.
-D 2014-04-23T12:57:55.344
+C Improvements\sto\scomments.\s\sStore\ssome\sextra\sinformation\sin\sSqliteThread\sthat\nis\suseful\sfor\sdebugging.
+D 2014-04-24T12:28:28.628
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in ad0921c4b2780d01868cf69b419a4f102308d125
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -272,7 +272,7 @@ F src/test_thread.c 1e133a40b50e9c035b00174035b846e7eef481cb
 F src/test_vfs.c e72f555ef7a59080f898fcf1a233deb9eb704ea9
 F src/test_vfstrace.c 3a0ab304682fecbceb689e7d9b904211fde11d78
 F src/test_wsd.c 41cadfd9d97fe8e3e4e44f61a4a8ccd6f7ca8fe9
-F src/threads.c b8e7232f2b9c9d148d6886117160de394d172f85
+F src/threads.c e35de159f9ced746266ff4b2129b7a828e59119c
 F src/tokenize.c 6da2de6e12218ccb0aea5184b56727d011f4bee7
 F src/trigger.c 66f3470b03b52b395e839155786966e3e037fddb
 F src/update.c 5b3e74a03b3811e586b4f2b4cbd7c49f01c93115
@@ -286,7 +286,7 @@ F src/vdbeapi.c 0ed6053f947edd0b30f64ce5aeb811872a3450a4
 F src/vdbeaux.c 8289ed68e2262844334461ccb1b91c4d55b29b0b
 F src/vdbeblob.c 9205ce9d3b064d9600f8418a897fc88b5687d9ac
 F src/vdbemem.c 6fc77594c60f6155404f3f8d71bf36d1fdeb4447
-F src/vdbesort.c f93c8aaff5398a702a7b49aae128031e050300b9
+F src/vdbesort.c 2b13026e5d4afa4737a312715aa1cd7e2f4d07c2
 F src/vdbetrace.c 6f52bc0c51e144b7efdcfb2a8f771167a8816767
 F src/vtab.c 21b932841e51ebd7d075e2d0ad1415dce8d2d5fd
 F src/wal.c 76e7fc6de229bea8b30bb2539110f03a494dc3a8
@@ -1165,7 +1165,7 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh d1a6de74685f360ab718efda6265994b99bbea01
 F tool/win/sqlite.vsix 030f3eeaf2cb811a3692ab9c14d021a75ce41fff
-P 5fce40c44aacf883df2e8e9472c399a6e92197b3 65d2544af9adc1e2f1d193e57f8be0422fb0d5eb
-R 07151f40a802d55a98a20acba34885fa
+P e2c9f71a451e44040624b9f255b4510743513019
+R 85ab93c26e2f3dfc5f24d719f3aa0846
 U drh
-Z 85be1e117efe898356ded29b053b1ff8
+Z 26e90d38e785197a28b1e4097f1c9b04