quad-band support

hi, i like to introduce support for additional bands for osmocom/layer23: - GSM 850 - PCS (1900) - GSM 480 and GSM 450 all bands can be enabled/disabled individually via VTY settings. by default, only 900 and DCS (1800) are enabled. note that the bands must be supported by the phone's tranceiver in order use them. to test it in the US, change your VTY settings like this: enable configure terminal ms 1 (or whatever your instance name is) support no p-gsm no e-gsm no r-gsm gsm-850 no dcs pcs end write of course you may enable all four bands, but this makes no sense, because your hardware does not support all bands. you will find the support in the jolly/quadband branch. it will be merged, if it is fully tested. be sure to set "ulimit unlimited" in your shell to get a core dump in case of a crash, so you can use gdb to locate where it happened: "gdb ./mobile core" everything else should work as usual. regards, andreas