Add interesting patches from gr-osmosdr mailing list

[rxseger]

There may be some useful unapplied patches on the gr-osmosdr mailing list to

http://lists.osmocom.org/pipermail/osmocom-sdr/2016-January/thread.html

• [ ] [patch]: rtl_sdr, fix -n parameter http://lists.osmocom.org/pipermail/osmocom-sdr/2016-January/000151.html - to rtlsdr_callback, not applied in https://github.com/librtlsdr/librtlsdr/blob/development/src/rtl_sdr.c
• [ ] [rtl-sdr][PATCH 1/2] rtl_fm: Add scanner progress - http://lists.osmocom.org/pipermail/osmocom-sdr/2016-January/000152.html - reply to message from 2015, I'd like this feature, needs digging through mailing list to find patches - update found it: http://lists.osmocom.org/pipermail/osmocom-sdr/2015-July/000079.html
• [ ] [PATCH] rtl_fm null squelch http://lists.osmocom.org/pipermail/osmocom-sdr/2015-November/000138.html - "-E nullsquelch" to add silence instead of pausing (could also be useful: split on squelch)
• [ ] [rtl-sdr][PATCH 2/2] rtl_fm: Add squelch timeout http://lists.osmocom.org/pipermail/osmocom-sdr/2015-July/000080.html