More general handling of memory loss in dlclose (backported from 5.2)

Fixed supression in mysql-test-run so it also works on windows.

mysql-test/mysql-test-run.pl:
  Fixed supression so it also works on windows.
mysql-test/valgrind.supp:
  More general handling of memory loss in dlclose (backported from 5.2)
sql/signal_handler.cc:
  Added newlines around link to how to do bug reports

mysql-test/mysql-test-run.pl

@@ -4443,9 +4443,9 @@ sub extract_warning_lines ($) {
      qr/Failed on request_dump/,
      qr/Slave: Can't drop database.* database doesn't exist/,
      qr/Slave: Operation DROP USER failed for 'create_rout_db'/,
-     qr|Checking table:   '\./mtr/test_suppressions'|,
+     qr|Checking table:   '\..mtr.test_suppressions'|,
      qr|Table \./test/bug53592 has a primary key in InnoDB data dictionary, but not in MySQL|,
-     qr|mysqld: Table '\./mtr/test_suppressions' is marked as crashed and should be repaired|,
+     qr|mysqld: Table '\..mtr.test_suppressions' is marked as crashed and should be repaired|,
      qr|InnoDB: Error: table 'test/bug39438'|,
      qr|table.*is full|,
     );

mysql-test/valgrind.supp

@@ -386,134 +386,18 @@
    fun:__libc_start_main
 }
 
+#
+#  dlclose can allocate memory for error message, the memory will be
+#  freed by dlerror or other dl* function.
+#
 {
-   dlclose memory loss from udf_free
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z8udf_freev
-}
-
-{
-   dlsym memory loss from udf_free on SuSE 11.1 x64 variant 2
-   Memcheck:Leak
-   fun:calloc
-   obj:/lib*/ld-*.so
-   fun:dlclose
-   fun:udf_free
-}
-
-{
-   dlclose memory loss from plugin variant 1
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:plugin_dl_del(st_mysql_lex_string const*)
-}
-
-{
-   dlclose memory loss from plugin variant 2
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 3
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_scope_free
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 4
-   Memcheck:Leak
-   fun:malloc
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/libdl-*.so
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 5
-   Memcheck:Leak
-   fun:malloc
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/ld-*.so
-   obj:/lib*/libdl-*.so
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-}
-
-{
-   dlclose memory loss from plugin variant 6, seen on Ubuntu Jaunty i686
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_scope_free
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:dlclose_doit
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 7, seen on Ubuntu Jaunty i686
-   Memcheck:Leak
-   fun:malloc
-   fun:_dl_close_worker
-   fun:_dl_close
-   fun:dlclose_doit
-   fun:_dl_catch_error
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
-
-{
-   dlclose memory loss from plugin variant 8
+   memory "loss" from dlclose error messages
    Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
+   fun:*alloc
+   ...
    fun:dlclose
-   fun:_Z15free_plugin_memP12st_plugin_dl
-   fun:_Z13plugin_dl_delPK19st_mysql_lex_string
 }
 
-{
-   dlclose memory loss from plugin variant 9
-   Memcheck:Leak
-   fun:calloc
-   fun:_dlerror_run
-   fun:dlclose
-   fun:_ZL15free_plugin_memP12st_plugin_dl
-   fun:_ZL13plugin_dl_delPK19st_mysql_lex_string
-}
 
 {
    dlsym memory loss from plugin on SuSE 11.1 x64

sql/signal_handler.cc

@@ -88,10 +88,10 @@ extern "C" sig_handler handle_fatal_signal(int sig)
   my_safe_printf_stderr("%s",
     "This could be because you hit a bug. It is also possible that this binary\n"
     "or one of the libraries it was linked against is corrupt, improperly built,\n"
-    "or misconfigured. This error can also be caused by malfunctioning hardware.\n");
+    "or misconfigured. This error can also be caused by malfunctioning hardware.\n\n");
 
   my_safe_printf_stderr("%s",
-                        "To report this bug, see http://kb.askmonty.org/en/reporting-bugs\n");
+                        "To report this bug, see http://kb.askmonty.org/en/reporting-bugs\n\n");
 
   my_safe_printf_stderr("%s",
     "We will try our best to scrape up some info that will hopefully help\n"