typo: unvalid -> invalid

Remove redundant main() prototype which survived a K&R to ANSI transition.

Use __dead

Remove the \n and tabs from the __COPYRIGHT() strings.

Remove clause 3 and 4 from TNF licenses

fix typos

appease gcc -Wuninitialized

Add (unsigned char) cast to ctype function

Sync usage with man page. Closes PR 25861 by Kouichirou Hiratsuka.

Homogenize usage messages: make the 'usage' word all lowercase, as this seems
to be the most common practice in our tree.

Remove unused code left over from temporary printescaped functionality.
Noted by Jeff Ito in PR bin/23967.

Following private discussion with kleink@ and hubertf@ and public discussion
on tech-userlevel@, back out printescaped() functionality.
kleink: ``We sell rope.''

Fix two more memory leaks found by Hubert Feyrer.

As discusses a little while back on tech-userlevel:

If stdout is a tty, use vis(3) to print any filenames to prevent garbage
from being printed if the filename contains control- or other non-printab

As discusses a little while back on tech-userlevel:

If stdout is a tty, use vis(3) to print any filenames to prevent garbage
from being printed if the filename contains control- or other non-printable
characters.

While here, sprinkle some EXIT_FAILURE and NOTREACHED where appropriate.

show more ...

no need for \n on errx

- Don't put space before function call operator.
- Remove trailing whitespace.
- Put an empty line if function doesn't have local variables.
- Use tab instead of spaces.

Add setprogname call. Patch from Petri Koistinen.

ANSIfication and KNF fixes by Petri Koistinen via bin/13690.

convert to use getprogname()

Report vendor-specific data length, if any.

Update for changes to the changer driver.

formatting nits.

Some code cleanup to collect all the usage strings in one place.
Asked for and reviewd by Jason thorpe.

Delint.

Delint.