Added open modifier '-' to skip/ignore locking. See bug #20828, #20858

Add Berkeley db4 support

Make magic_quotes_runtime work bidirectional for dba

Add magic_quotes_runtime support

Fix locking behaviour: On some systems read during write is permitted but
most libraries are not capable of that. GDBM is system dependant so there
we only test that we do not deadlock.

Use php_flock instead of flock

-fix file open mode when modifier 'd' is used
#Add my name to authors

Emit a warning when open mode modifier t is used wrong.

-Centralise open stream for builtin modules that use streams
-If locks work on database file then only one stream open call is used

finish work on locking
-all but gdbm do internal locking now since only gdbm has internal locking
-you can force locking on database or lck file (with gdbm this makes no
sense so a notic

finish work on locking
-all but gdbm do internal locking now since only gdbm has internal locking
-you can force locking on database or lck file (with gdbm this makes no
sense so a notice is generated)

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-lock support moved from dba_flatfile.c to dba.c
-flatfile, cdb, cdb_make use locking now
#locking is blocking per default use 'rt', 'wt', ct' or 'nt' for non blocking alias
#test access

-lock support moved from dba_flatfile.c to dba.c
-flatfile, cdb, cdb_make use locking now
#locking is blocking per default use 'rt', 'wt', ct' or 'nt' for non blocking alias
#test access to a database file.
#locking uses flock() which will be emulated or warned if that is not eally
#possible in ext/standard/flock_compat.c

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emalloc never returns 0, so we can simplify the code paths.
also replace ecalloc with emalloc+memset, so that the latter can be inlined.

Use the the name 'flatfile' correctly so the handler support can be built now.
#I do not like the lock solution since a crashed php would leave the *lck
#file locked now.

move newly introduced flatfile support from dbm to new flatfile handler
# do not make the same mistake as with ext/db where it was not clear
# which format was used.

-use of emalloc functions
-info was not initialised fulle due to memset parameters
now that the whole structure is initialised we can stop putting 0 in it.

Why did open fail?

incorporate cdb-0.75 as suggested by D. J. Bernstein
#dba now supports cdb_make

passing around TSRM
#going to add CDB_MAKE support

cdb now allows multiple key-value pairs with same key

php_error -> php_error_docref

Implemented dba_list() that returns an array rsrcid=>filename and a test.

implemented dba_handlers()
@Added dba_handlers() that lists all installed handlers in an array. (marcus)

Made this extension to use the resource stuff

Unify error messages

Maintain headers.