pgbouncer - pgbouncer: SHOW MEM cmd to describe slab usage

Log Message:
-----------
SHOW MEM cmd to describe slab usage

Modified Files:
--------------
pgbouncer/include:
slab.h (r1.2 -> r1.3)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/include/slab.h.diff?r1=1.2&r2=1.3)
pgbouncer/src:
admin.c (r1.28 -> r1.29)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/admin.c.diff?r1=1.28&r2=1.29)
slab.c (r1.3 -> r1.4)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgbouncer/pgbouncer/src/slab.c.diff?r1=1.3&r2=1.4)