- fix memory leak
- xxx questionable allocation
- remove casts
- use sizeof(*var)
- bcopy -> memcpy/memmove

PR/50919: David Binderman: Re-do all the debug stuff in a more sustainable way.

cast isblank(3)'s argument to unsigned char.

* Rewrote internal handling of multiline field line data to fix a bug
where a newly opened line would immediately get wrapped out of existence.
The old method of handling lines in a multiline fie

* Rewrote internal handling of multiline field line data to fix a bug
where a newly opened line would immediately get wrapped out of existence.
The old method of handling lines in a multiline field did not cope with
this elegantly.

* Added new field flag O_REFORMAT which, when set, returns the field
buffer with newlines inserted where the line wrapped. Previously, there
was no way of preserving the on screen format of a multiline field.

* Added new file gdbinit which contains a macro to verify and print
the multiline field line data structure.

* Bumped libform major number due to changes in the _form_field structure.

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s/the the/the/ (only in sources that aren't regularly imported from
elsewhere).

Correct the fourth parameter to match_enum() to "exact" instead of "no blanks".
From Brett Lymn.
Part of the fix for PR bin/24604.

use __RCSID()

withough -> without

Added field and character checking.

Added check for null args pointer.

* Fixed common error in all types code
* Removed the args field from types struct and made sure the args in
the field are used.

* Stop next/prev field commands wrapping
* Made debug file open a function call that can be called multiple
times.
* Fixed the enum type.

Added early release version of libform - please be gentle.