Changes

Extend shared-macros.mk variables for postgres and add equivalent ones
for mysql (mariadb)
 (commit: eb149b9)

Extend shared-macros.mk GNU path variables to match flexibility of USR
path variables
 (commit: b323a77)

Extend shared-macros.mk KERNEL variables with 32-bit variants (same as
base) just to ease usage with $(BITS) expansions
 (commit: 0d49fff)

Extend shared-macros.mk with USRLIBDIR32
 (commit: f540dc2)

Extend shared-macros.mk with USRSHAREMAN8DIR to aid deliveries of "man8"
pages
 (commit: cb09633)

Extend shared-macros.mk with *.$(BITS) suffixed USR and GNU paths (BIN,
SBIN, LIB) for default=32bit vs extended=64bit setups
 (commit: fae1cab)

Extend shared-macros.mk with SFW macros to match USR and GNU macros
family
 (commit: b728c5a)

shared-macros.mk : USR path macros alignment fixed upon PR request
 (commit: 0f426dc)