Change the mailman links (#358)

Links when wrapping become misleading.  Insert newline to prevent wrapping.

Fix By: Gisle Vanem (@gvanem)

docs/acountry.1

@@ -24,7 +24,8 @@ Display this help and exit.
 Be more verbose. Print extra information.
 .SH "REPORTING BUGS"
 Report bugs to the c-ares mailing list:
-\fBhttp://cool.haxx.se/mailman/listinfo/c-ares\fR
+.br
+\fBhttps://cool.haxx.se/mailman/listinfo/c-ares\fR
 .SH "SEE ALSO"
 .PP
 adig(1), ahost(1).

docs/adig.1

@@ -61,7 +61,8 @@ This compacted \fBbit-string\fR form is not supported by many DNS-servers.
 
 .SH "REPORTING BUGS"
 Report bugs to the c-ares mailing list:
-\fBhttp://cool.haxx.se/mailman/listinfo/c-ares\fR
+.br
+\fBhttps://cool.haxx.se/mailman/listinfo/c-ares\fR
 .SH "SEE ALSO"
 .PP
 acountry(1), ahost(1).

docs/ahost.1

@@ -35,7 +35,8 @@ for DNS configuration; it has no effect on other platforms (such as Win32
 or Android).
 .SH "REPORTING BUGS"
 Report bugs to the c-ares mailing list:
-\fBhttp://cool.haxx.se/mailman/listinfo/c-ares\fR
+.br
+\fBhttps://cool.haxx.se/mailman/listinfo/c-ares\fR
 .SH "SEE ALSO"
 .PP
 acountry(1), adig(1).