handle existing CVS/Tag file when adding new directories. OK joris@.

a bug in cvs_mkpath() prevented to create the CVS admin directory and
files under some special circumstances. remove a bogus stat() check to
fix it.

ok joris@

make sure cvs_get_repository_path returns a valid repo name
for the import command.

hello import, only works for non-existing repositories right now,
but work is in progress for importing stuff into existing repositories.

make the log command use rcs_translate_tag

add code which allows us to select revisions based upon
a string given by the user on the command line, much like
rcs_revision_select in OpenRCS.

this will be usefull for some commands.

several fixes to the file api:
- default to CVS_FILE when something is totally unknown
- cvs_get_repository_path() now returns the full repository path for
the given argument.
- cvs_get_repository_

several fixes to the file api:
- default to CVS_FILE when something is totally unknown
- cvs_get_repository_path() now returns the full repository path for
the given argument.
- cvs_get_repository_name() returns the contents of CVS/Repository
to the caller.
- allow command callbacks to specify if our recursion code needs
to skip the directory or not.
- when checking for a admin directory, make sure it is in fact
a directory. if it is not we dont want to recurse inside.

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boogie cvs_yesno() down the removal hatch, it is not used.

commit the new opencvs code, i have been hacking on
this for the past 2 weeks now and it should go in at
the start of the hackathon so others can help out.

this code is a lot safer, smarter, faster

commit the new opencvs code, i have been hacking on
this for the past 2 weeks now and it should go in at
the start of the hackathon so others can help out.

this code is a lot safer, smarter, faster and best of
all it is actually doing what it is suppose to do!

basic checkout, update, status, diff and commit are
working in local mode only.
there is no support for any remote setups now.

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remove a metric buttload of excessive ()
no binary change; ok ray

Use variable names for sizeof, remove casts in front of xmalloc,
use xcalloc and xstrdup where appropriate, and other stuff.

OK joris@

Yet more lint:
- Explicitly test for -1 from read(2) and write(2).
- Change negative parameters to 0 for rcsnum_cmp(). (I think xsa@ had
a patch for this earlier.)
- Remove unused variables.

Yet more lint:
- Explicitly test for -1 from read(2) and write(2).
- Change negative parameters to 0 for rcsnum_cmp(). (I think xsa@ had
a patch for this earlier.)
- Remove unused variables.
- Changed return types to void if we only return one value.
- Fix possible one-character truncation in rcs_deltatext_set().
- Use memcpy() to copy u_char arrays.
- Use ptrdiff_t to hold pointer differences.
- int -> size_t for sizeof/strlen

``looks fine'' xsa@

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xmalloc(num * size) -> xcalloc(num, size)
asprintf -> xasprintf
Remove asprintf check, which was non-portable anyway.

``okidoki'' xsa@

Today is Integer Overflow Prevention Day:
- Sync xmalloc.? with ssh versions.
- Change all xrealloc() calls to new API.

``I really like this.'' niallo@

Plug a memory leak for all cvs_strsplit call sites; ok xsa@

- Lint says cvs_hacktime() is not used in rcs, so move it into !RCSPROG.

ok xsa@

rlog_strsplit() -> cvs_strsplit() and move it to util.c so it can be reused
by `cvs log' and some other RCS utilities. "Looks good" ray@.

- add util.h, reorganising a bunch of things and exposing cvs_yesno()
function to be used by rcs.

cvs_mkadmin() cannot return < 0 anymore;

strings cleanup; OK niallo@.

rename variable to fix shadow warning;

#include's cleanup; ok joris@ niallo@.

more code cleanup;
ok xsa@

i'm commiting only hours after newyear,
ah the joys of being a true geek.

more code cleanup, ok niallo@ and xsa@

add an argument to cvs_chdir() which enables or not the removal
of the directory we just chdir'd to.
Useful when the function fails especially for the server mode and
its temporary directory. This wa

add an argument to cvs_chdir() which enables or not the removal
of the directory we just chdir'd to.
Useful when the function fails especially for the server mode and
its temporary directory. This way it's not left behind on exit.
ok joris@.

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