Fix the cksumvfs extension so that it will not register itself more than

once.

FossilOrigin-Name: d5cdd57150db914b61b8b9c61c6caac9690fe7b647ee2c003e75b9b62be62752

ext/misc/cksumvfs.c

@@ -743,7 +743,7 @@ static int cksmRegisterFunc(
 static int cksmRegisterVfs(void){
   int rc = SQLITE_OK;
   sqlite3_vfs *pOrig;
-  if( sqlite3_vfs_find("cksum")!=0 ) return SQLITE_OK;
+  if( sqlite3_vfs_find("cksmvfs")!=0 ) return SQLITE_OK;
   pOrig = sqlite3_vfs_find(0);
   cksm_vfs.iVersion = pOrig->iVersion;
   cksm_vfs.pAppData = pOrig;

manifest

@@ -1,5 +1,5 @@
-C Performance\soptimization\sin\sthe\stransfer\sof\serror\smessages\sfrom\sstatements\nto\sconnections.
-D 2020-05-26T20:31:17.309
+C Fix\sthe\scksumvfs\sextension\sso\sthat\sit\swill\snot\sregister\sitself\smore\sthan\nonce.
+D 2020-05-26T20:33:18.026
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -285,7 +285,7 @@ F ext/misc/appendvfs.c 3777f22ec1057dc4e5fd89f2fbddcc7a29fbeef1ad038c736c54411bb
 F ext/misc/blobio.c a867c4c4617f6ec223a307ebfe0eabb45e0992f74dd47722b96f3e631c0edb2a
 F ext/misc/btreeinfo.c 26004b7a6be320ec08fc20ca8d0f01fccb00a98cbe0f3197446794ff2a506aa3
 F ext/misc/carray.c 91e9a7f512fda934894bed30464552fffa7d3073b5be04189ae0bd0c59f26bfd
-F ext/misc/cksumvfs.c b0d07f2e1bb08f8b6f311f4e454360b6a7f0021912c326428d74900020f29c31
+F ext/misc/cksumvfs.c a3271f5cc3f87d80897cca76d54220380aeae3448efd23fefe47853443ef1185
 F ext/misc/closure.c dbfd8543b2a017ae6b1a5843986b22ddf99ff126ec9634a2f4047cd14c85c243
 F ext/misc/completion.c a0efe03edfdc4f717c61e6c9b0bfe2708ff7878010dae3174980a68fdf76aabc
 F ext/misc/compress.c 3354c77a7c8e86e07d849916000cdac451ed96500bfb5bd83b20eb61eee012c9
@@ -1866,7 +1866,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 790badb390d59062cd2d8d1dec76cc6104c9425610a67503f6be38076b6a458e
-R abd22ed4e954a363c14f11187a7348c8
+P 0e898f4fed1c851cb90f940175110e632a20668a285d39f5f94f7358c3064882
+R 72833d867a696e36a90b89db4d555cd5
 U drh
-Z e7622c5a97ba4fe1a01d807db0ece61d
+Z 876d4518a5496ca7a456d49d64fbf19e

manifest.uuid

@@ -1 +1 @@
-0e898f4fed1c851cb90f940175110e632a20668a285d39f5f94f7358c3064882
+d5cdd57150db914b61b8b9c61c6caac9690fe7b647ee2c003e75b9b62be62752