Merge branch 'jk/apache-lsan'

Allow tests that involve httpd to be run under leak sanitizer, just
like we can already do so under address sanitizer.

* jk/apache-lsan:
  t/lib-httpd: pass LSAN_OPTIONS through apache

t/lib-httpd/apache.conf

@@ -76,6 +76,7 @@ PassEnv GIT_VALGRIND
 PassEnv GIT_VALGRIND_OPTIONS
 PassEnv GNUPGHOME
 PassEnv ASAN_OPTIONS
+PassEnv LSAN_OPTIONS
 PassEnv GIT_TRACE
 PassEnv GIT_CONFIG_NOSYSTEM
 PassEnv GIT_TEST_SIDEBAND_ALL