Rewrite the configure GTK and WebKitGTK test section. The old code was way too confusing and complicated with nested ifs. Simplify the code with a primary and alternate webkit package. Display the selected GTK version and WebKit package during configure. This change removed a "WebKitGtk" package, which I am not sure what it was from... but if it causes problems revisit later. --with-gtk4 will override --with-gtk2 now and will always default to GTK3. If --with-gtk2 is used with no GTK2 installed or --with-gtk4 is used with no GTK4 installed use GTK3. Then in a second pass we check the package we have selected and add any necessary defines so the correct code paths are followed during compile.

option DESCRIPTION 'Dynamic Windows Compatibility Module for OS/2'
segment type DATA NONSHARED LOADONCALL

export makedir.20
export vargs.21
export setfileinfo.22
export drivefree.23
export isdrive.24
export drivesize.25
export getfsname.26

export _opendir.30
export _openxdir.31
export _readdir.32
export _seekdir.33
export _telldir.34
export _closedir.35

export fsopen.40
export fsclose.41
export fsgets.42
export fsseek.43

export locale_init.50
export locale_string.51

export nice_strformat.60
export initdir.61