Separators in pg_hosts.conf fields

If the build directory name contains a comma,
src/test/modules/ssl_passphrase_callback fails on master since commit 4f43302.
It fails because hba.c:next_token() treats a comma as a token separator:

 * Tokens can be delimited by double quotes (this allows the inclusion of
 * commas, blanks, and '#', but not newlines).  As in SQL, write two
 * double-quotes to represent a double quote.

Commit 4f43302 documented the pg_hosts.conf hostname field as a
comma-separated list, but not the other fields.  Should other pg_hosts.conf
fields continue to require quoting around commas, or not?