exec(3): execlpe() first argument should be named "file"

"path" arguments are names used as-is, "file" arguments to "p"
functions are used to construct the pathname using $PATH if necessary.

Remove superfluous Pp.

Document history of exec()
Move statement on execlpe() & execvpe() to HISTORY section.

branches: 1.29.4; 1.29.6;
Remove superfluous Tn.

Add execlpe and execvpe to the NAME section

Fix typo; ".Lx" should be ".Nx"

branches: 1.26.2;
Add execvpe in one more place to explain its last argument.
Call character '0' 'NUL' instead of 'null'.

Consistency in commas. Wording.

missed one reference.

add execvpe, execlpe (reviewed by phone)

- Correct macro usage;
- sort section order.

From Bug Hunting.

branches: 1.21.6; 1.21.12;
Use .In for header files instead of .Ar Pa and variations.

<> -> Aq.

cross reference script.7

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22280, verified by myself.

Use
.In header.h
instead of
.Fd #include \*[Lt]header.h\*[Gt]
Much easier to read and write, and supported by groff for ages.
Okayed by ross.

Fix formatting glitch, end sentence with a dot, and use Nm instead of
a self-Xr. Update Dd for recent changes.

default path doesn't contain current directory anymore.
from openbsd.

reflect change of default path.
from openbsd.

Generate <>& symbolically.

Formatting improvements.

begin executed --> being executed

branches: 1.10.12;
Fix mdoc .Xr reference for syntax or correctness (e.g. exec(2) versus exec(3)).
Make other mdoc corrections as inspection dictated.

add LIBRARY section to man page

Un-capitalize function names at the beginning of line.

In the SEE ALSO list,

- remove duplicated `environ(7)'.
- remove unexistent system call `trace(2)'.
- delete a period at the end.

Add missing `STANDARDS' compliance statements. As we #define _POSIX_VERSION
to 199009L, bump existing statements to 1003.1-1990.

merge with Lite, keeping local changes. Also use new Id format.

Fix spelling errors.

Use "Er" for argument to -width in the lists in the ERROR sections so that
formatting is consistant.
Other misc. tweaks.

Add RCS identifiers.

branches: 1.1.1;
Initial revision