Distribution with source fails to build

[abekornelis]

When installing z390 from the downloaded distribution file with source code, the build procedure executes RELVER.BAT
This procedure in turn - when git is not installed - fails the build procedure.
In order for a git-less environment to be able to build z390, the RELVER.BAT should ask whether to proceed or abort.
When proceeding, it should use the z390.properties in the distribution file, but it's not yet included.
So the build for the distribution needs to be modified to include the z390.properties file.

When git is installed, a different error is produced by RELVER.BAT, equally preventing the build from succeeding.
For any error encountered, RELVER.BAT should give the option of terminating, or continuing as if FORCE had been provided.
But this does require z390.properties to be included in the distro.

[abekornelis]

Required changes include at least:
for BUILD.BAT:

call bat\bldjar         %z_TraceMode% %1       || goto error

for bat\RELVER.BAT:

:final
if %z_Version% EQU "Uncontrolled" (if /I "%1" NEQ "FORCE" (echo Version is uncontrolled - add FORCE parm to ignore
                                                           set z_ReturnCode=8
                                                           goto return
                                                   ) else (echo Version is uncontrolled - FORCE enabled
                                                           if exist z390.properties goto return
                                   )                       )
rem relver: use git to set z390.properties version details
echo z390 version %z_Version%
echo version=%z_Version%> z390.properties
set z_ReturnCode=0

for z390.properties:

version=v1.7.06-261-gd530e8a1