greendns: full comment lines were not skipped; Thanks to nat-goodspeed

`greendns.HostsResolver.LINES_RE` doesn't admit the possibility of a
comment starting at the beginning of a line. This has been ignored since `is_ipv4_addr()` and `is_ipv6_addr()` catch `dns.exception.SyntaxError` and return `False`. But in a runtime environment that encounters #413, `dns.exception.SyntaxError` is not caught, and the
import fails.

Changing '+' to '*' allows `HostsResolver._readlines()` to recognize and skip
comment lines.

greendns.HostsResolver._readlines(), a purely internal method, now returns an
itertools generator rather than a list. Change relevant asserts to build a
list before comparing.

0 files changed, 0 insertions, 0 deletions