hostcheck: fix host name wildcard checking

The leftmost "label" of the host name can now only match against single
'*'. Like the browsers have worked for a long time.

- extended unit test 1397 for this
- move some SOURCE variables from unit/Makefile.am to unit/Makefile.inc

Reported-by: Hiroki Kurosawa
Closes #11018

tests/data/test1397

@@ -2,8 +2,7 @@
 <info>
 <keywords>
 unittest
-ssl
-wildcard
+Curl_cert_hostcheck
 </keywords>
 </info>
 
@@ -16,9 +15,8 @@ none
 <features>
 unittest
 </features>
- <name>
-Check wildcard certificate matching function Curl_cert_hostcheck
- </name>
+<name>
+Curl_cert_hostcheck unit tests
+</name>
 </client>
-
 </testcase>