Description of problem:
The PAM(8) man page says that each rule is "typically placed on a
single line, but may be extended with an escaped end of line."
Authconfig parses PAM configuration files, but it does not seem
to recognize or honor any portion of a rule which follows the
line continuation character.

Version-Release number of selected component (if applicable):
All

How reproducible:
Reproducible.

Steps to Reproduce:
1. Add several options to a rule line such as pam_unix:
   password  required  pam_unix.so  nullok \
                                    use_authtok \
                                    md5 shadow remember=7
2. Run authconfig and note that it doesn't see any options
   on "continued" portions of the line.
  
Actual results:
No options on "continued" portions of the line are recognized (MD5,
shadow, etc.)

Expected results:
Authconfig should recognize and process all arguments, as per
PAM(8).

Additional info:
I'm attaching a patch file which corrects the problem.  The patch
was created against the authconfig-4.6.8 src rpm, but the code
was very straightforward and could(should?) apply to any version.