Merge branch 'master' into 'master'

Ignore the database being busy.

This fixes issue https://projects.sucs.org/arthur/mw/issues/3 by just ignoring
busy messages when the DB get overloaded by spamming messages with a hashtag.

See merge request !1

src/sqlite.c

@@ -99,7 +99,7 @@ struct db_result *db_query(const char *dbname, const char *query, int quiet)
 		}
 	} while (ret == SQLITE_BUSY && retries > 0);
 
-	if (ret != SQLITE_OK) {
+	if (ret != SQLITE_OK && ret != SQLITE_BUSY) {
 		if (!quiet) {
 			switch (ret) {
 				case SQLITE_BUSY: printf("BUSY "); break;