Ben

+ fix bug in nextprime for inputs < 11 (thanks EdH)

+ addmod and submod also improved with Mersenne inputs (about 3% faster for stg1 and 7% for stg2)

+ protect newer avx-ecm code when skylakex and/or nfs is not available

+ fixed a bug in the SOE where too many blocks were initialized in offsets.c

+ quieter .ini initialization by default and fix some gcc compiler warnings in driver.c

+ attempt to fix crash report - suspected to be in soe - primarily with update to linesieve.c

catching up on some smallish changes

+ fixed a bug in SOE when sieving huge ranges