Hello again Falko,
Two things I wonder about now: There is no "Listen 443" anywhere in the httpd.conf or vhosts file and there seems to be no reference to mod_ssl.c or ssl_module in the LoadModule directives in the httpd.conf file. Should there be?
mod_ssl.c does not seem to be compiled in either:
# /usr/sbin/httpd -l
Compiled in modules: