DB9-null-modem-loopback-switcharoo

Small board with two DB9 connectors to make serial testing easier. DPDT switch to control straight through or null-modem of RX/TX and SPDT switch to connect RX to TX for loop back testing as well as a 3 pin header for logic analyzer. Remaining signals not conncected as adding more or bigger switches for complete null-modem switching would be excessive and only GND/RX/TX fit my needs.