Get rid of SE functions and move remaining sql mm to postgis.sql.in.c

[robe]

sqlmm.sql.inc.c is a bit of a misnomer because it has all ESRI ArcSDE compatible functions (which we don't think ESRI even uses when PosTGIS is snapped into an SDE belt), and has some sql mm, but most sqlmm are already in postgis.sql.c except for the linear referencing ones.

I'm almost done removing SE functions and will merge the rest of functions into postgis.sql.in.c when I am done

[robe]

Got rid of SE at r8680

[robe]

merged sqlmm.sql.in.c into postgis.in.sql.c at r8682