sessreg: Changes to 'master'

[Alan Coopersmith]

 configure.ac        |    2 -
 man/Makefile.am     |    2 -
 man/filenames.sed.c |    7 ++++
 man/sessreg.man     |   61 ++++++++++++++++++++++++++++++-----------
 sessreg.c           |   76 +++++++++++++++++++++++++++++++++++++++-------------
 sessreg.h           |    3 +-
 6 files changed, 113 insertions(+), 38 deletions(-)

New commits:
commit 8fb21bdf15185e18e44b5dab6740720a50b9f0c9
Author: Alan Coopersmith <alan.coopersmith at oracle.com>
Date:   Tue Nov 4 18:32:07 2014 -0800

    Attempt to modernize and better disentangle utmp vs. utmpx in the man page
    
    Also reduces the number of references to BSD vs. System V differences
    from the early 90's which are no longer relevant today.
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

commit e9d23df81ae6e5beb79237cb13b555ed689b1a76
Author: Alan Coopersmith <alan.coopersmith at oracle.com>
Date:   Tue Nov 4 16:31:31 2014 -0800

    Stop disabling utmpx & wtmpx calls when -u & -w arguments are passed
    
    The handling of the -u & -w flags would only set utmp_file & wtmp_file,
    leaving utmpx_file & wtmpx_file set to NULL, disabling the calls to the
    code to update those files.
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

commit 929b2f60c36b80b7a8e6237d5e8ccc981a3a1e0d
Author: Alan Coopersmith <alan.coopersmith at oracle.com>
Date:   Tue Nov 4 16:27:57 2014 -0800

    If both utmp & utmpx interfaces are available, just use utmpx
    
    As we already do with wtmp & wtmpx, where only one of the interface sets
    is compiled in at a time, stop building & potentially calling both the
    utmp & utmpx interfaces, which could lead to confusion and corruption,
    especially when xdm passed -u /.../utmpx and sessreg wrote utmp format
    records to the file instead.
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

commit 0a234ecc502b3e08d8f81d51fb724d97e8045504
Author: Alan Coopersmith <alan.coopersmith at oracle.com>
Date:   Mon Nov 3 20:04:31 2014 -0800

    Zero initialize struct utmpx, as we already do for struct utmp
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>

commit 1dacc4b5554f794f8219356a0d2bd2dc6a499160
Author: Alan Coopersmith <alan.coopersmith at oracle.com>
Date:   Mon Nov 3 18:57:20 2014 -0800

    Print which option was in error along with usage message
    
    In the process, try to make the code a little less painful to read.
    Still, no love to whomever came up with (*++*a) style coding.
    
    Signed-off-by: Alan Coopersmith <alan.coopersmith at oracle.com>