fix spelling errors

modules/database/test/ioc/db/dbPutLinkTest.c

@@ -98,7 +98,7 @@ static void testLinkParse(void)
         if (td->info.target && info.target)
             testStrcmp(0, info.target, td->info.target);
         else if(!!td->info.target ^ !!info.target)
-            testFail("info target NULL mis-match %s %s", info.target, td->info.target);
+            testFail("info target NULL mismatch %s %s", info.target, td->info.target);
         else
             testPass("info target NULL as expected");
         if (info.ltype == td->info.ltype) {

modules/database/test/ioc/db/dbStaticTestAliasAgainError1.db

@@ -1,2 +1,2 @@
-# ERROR: alias using name of exising alias for different record
+# ERROR: alias using name of existing alias for different record
 alias("testrec", "testaliasAgain1")

modules/database/test/ioc/db/dbStaticTestAliasAgainError2.db

@@ -1,2 +1,2 @@
-# ERROR: alias using name of exising record fails
+# ERROR: alias using name of existing record fails
 alias("testrecAgain", "testrec")

modules/database/test/ioc/db/dbStaticTestRemove.db

@@ -35,7 +35,7 @@ record(x, "testdelrec8") {
 }
 
 record("#", "no:such:record") { }
-record("#", "also:non:existant") {
+record("#", "also:non:existent") {
     field(FOO, "5")
 }
 

modules/database/test/ioc/db/devx.c

@@ -60,7 +60,7 @@ xdrv *xdrv_get(int group)
             return curd;
         }
     }
-    cantProceed("xdrv_get() for non-existant group");
+    cantProceed("xdrv_get() for non-existent group");
     return NULL;
 }