Made ecpg compatibility mode and run-time behaviour options case insensitive.

src/interfaces/ecpg/preproc/ecpg.c

@@ -251,7 +251,7 @@ main(int argc, char *const argv[])
 					snprintf(informix_path, MAXPGPATH, "%s/informix/esql", pkginclude_path);
 					add_include_path(informix_path);
 				}
-				else if (strncmp(optarg, "ORACLE", strlen("ORACLE")) == 0)
+				else if (pg_strcasecmp(optarg, "ORACLE") == 0)
 				{
 					compat = ECPG_COMPAT_ORACLE;
 				}
@@ -262,11 +262,11 @@ main(int argc, char *const argv[])
 				}
 				break;
 			case 'r':
-				if (strcmp(optarg, "no_indicator") == 0)
+				if (pg_strcasecmp(optarg, "no_indicator") == 0)
 					force_indicator = false;
-				else if (strcmp(optarg, "prepare") == 0)
+				else if (pg_strcasecmp(optarg, "prepare") == 0)
 					auto_prepare = true;
-				else if (strcmp(optarg, "questionmarks") == 0)
+				else if (pg_strcasecmp(optarg, "questionmarks") == 0)
 					questionmarks = true;
 				else
 				{