GIS_H_DATE: switch to date -Iseconds format

[landam]

See #325 (comment)

[landam]

Both build_date and libgis_date changed to date -Iseconds format.

g.version -rg
...
build_date=2020-04-04T16:29:44
...
libgis_date=2020-03-31T20:34:57+02:00

[landam]

Note, build_date has no timezone info.

[HuidaeCho]

Not directly related to this commit... What is @(#) below in version.h?

#define GRASS_VERSION_STRING   "@(#) 7.9.dev (2020)"

[landam]

Not directly related to this commit... What is @(#) below in version.h?

#define GRASS_VERSION_STRING   "@(#) 7.9.dev (2020)"

No idea.

[HuidaeCho]

Not directly related to this commit... What is @(#) below in version.h?

#define GRASS_VERSION_STRING   "@(#) 7.9.dev (2020)"

No idea.

Maybe, it's a relic from the old days? If so and we don't know why it's there, safe to remove it in another PR?

[neteler]

#define GRASS_VERSION_STRING "@(#) 7.9.dev (2020)"

Maybe, it's a relic from the old days? If so and we don't know why it's there, safe to remove it in another PR?

Might be, from an old code versioning system?

I see in the code:

ag '@\(#\)'
vector/v.extract/extract.c
1:/*  @(#)xtract_lines.c    1.0  9/29/89   

lib/vector/diglib/prune.c
18:/*  @(#)prune.c 3.0  2/19/98  */

lib/manage/element_list
1:# @(#)Element_List

raster/r.out.bin/gmt_grd.h
3: *    The GMT-system:	@(#)gmt_grd.h	3.18  01/13/00

raster/r.proj/r.proj.h
1:/* @(#)r.proj.h v1.2 - 27 Jun 1995      -emes- */

raster/r.in.bin/gmt_grd.h
3: *    The GMT-system:	@(#)gmt_grd.h	3.18  01/13/00

include/version.h.in
1:#define GRASS_VERSION_STRING   "@(#) @GRASS_VERSION_NUMBER@ (@GRASS_VERSION_DATE@)"

Prior to CVS (end of 1999 introduced) something else was used for a while at CERL (and elsewhere, for the 3rd party software pieces).

I guess, @(#) can be removed.

[neteler]

@landam shall this be included in 7.8.3 yet?

[landam]

@landam shall this be included in 7.8.3 yet?

git log issue must be solved. I don't see this PR as a blocker for 7.8.3.

[landam]

I guess, @(#) can be removed.

See #528