installer: conf.c (HEAD)

[mis]

Module name:	installer
Changes by:	mis	03/01/21 19:41:59

Modified files:
	conf.c

Log message:
- file inclusion improvements:
   - non-absolute paths are prefixed by parent file's dirname
   - included file could be remote one, i.e declaration below now works:
       %include http://foo/poldek.conf
- '_' prefixed parameters are treated as user-level, private variables, e.g.
   configuration below now works:
   _pld_ra_rootdir = ftp://ftp.pld.org.pl/dists/ra
   source = ra	%{_pld_ra_rootdir}/PLD/i686/PLD/RPMS/
   source = ra-updates-security %{_pld_ra_rootdir}/updates/security/i686/