[ Alfonso Sanchez-Beato ] * doc, plugins/nettime.c: multi-modem support for nettime plugin * build, doc, gril, mtkmodem, rilmodem, plugins/ril.c,mtk.c: expose RadioSettings 'ModemTechnologies' property. This property can be used by clients to determine the supported raido technologies supported by a specific modem instance (LP: #1346790). * gril/gril.c, mtkmodem, plugins/mtk.c, unit: add support for SIM hot insertion/ removal support. Hot-swap is disabled by default. It can be enabled by defining OFONO_RIL_HOT_SIM_SWAP env var. * gril, rilmodem, plugins/mtk.c,ril.c: MTK MMS fix. For standalone MMS contexts, the cid and a special MMS-specific data profile need to included in the SETUP_DATA_CALL request. * gril, mtk, ril, mtkmodem, rilmodem: Fix MTK data attachment (LP: #1349911)