re-add sgi file, comment out mysterious lines with type "addr"

dist/file/magic/magdir/sgi

@@ -0,0 +1,59 @@
+
+#------------------------------------------------------------------------------
+# sgi:  file(1) magic for Silicon Graphics applications
+
+#
+#
+# Performance Co-Pilot file types
+0	string	PmNs				PCP compiled namespace (V.0)
+0	string	PmN				PCP compiled namespace
+#>3	addr	x				(V.%1.1s)
+3	long	0x84500526			PCP archive
+>7	byte	x				(V.%d)
+>20	long	-2				temporal index
+>20	long	-1				metadata
+>20	long	0				log volume #0
+>20	long	>0				log volume #%ld
+#>24	addr	x				host: %s
+0	string	PCPFolio			PCP 
+>9	string	Version:			Archive Folio
+#>18	addr	x				(V.%s)
+0	string	#pmchart			PCP pmchart view
+>9	string	Version
+#>17	addr	x				(V%-3.3s)
+0	string	pmview				PCP pmview config
+>7	string	Version
+#>15	addr	x				(V%-3.3s)
+0	string	#pmlogger			PCP pmlogger config
+>10	string	Version
+#>18	addr	x				(V%1.1s)
+0	string	PcPh				PCP Help 
+>4	string	1				Index
+>4	string	2				Text
+#>5	addr	x				(V.%1.1s)
+0	string	#pmieconf-rules			PCP pmieconf rules
+#>16	addr	x				(V.%1.1s)
+3	string	pmieconf-pmie			PCP pmie config
+#>17	addr	x				(V.%1.1s)
+
+# SpeedShop data files
+0	long	0x13130303			SpeedShop data file
+
+# mdbm files
+0	long	0x01023962			mdbm file, version 0 (obsolete)
+0	string	mdbm				mdbm file,
+>5	byte	x				version %d,
+>6	byte	x				2^%d pages,
+>7	byte	x				pagesize 2^%d,
+>17	byte	x				hash %d,
+>11	byte	x				dataformat %d
+
+# Alias|Wavefront Maya files
+0	string	//Maya ASCII	Alias|Wavefront Maya Ascii File,
+#>13	addr	x	version %s
+8	string	MAYAFOR4	Alias|Wavefront Maya Binary File,
+#>32	addr	x	version %s scene
+8	string	MayaFOR4	Alias|Wavefront Maya Binary File,
+#>32	addr	x	version %s scene
+8	string	CIMG		Alias|Wavefront Maya Image File
+8	string	DEEP		Alias|Wavefront Maya Image File