osmobts_sock: cosmetic: rename osmobts_sock.c to pcuif_sock.c

since OsmoPCU is no longer exclusively used in co-location to OsmoBTS
the module osmobts_sock (PCUIF) should get a more generic name.

Related: OS#5927
Change-Id: Ic7f6246265fa31be189e4aea36dfaa89bd0eeddd
diff --git a/src/Makefile.am b/src/Makefile.am
index ded6632..8b8f31e 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -82,7 +82,7 @@
 	rlc_window.cpp \
 	rlc_window_dl.cpp \
 	rlc_window_ul.cpp \
-	osmobts_sock.c \
+	pcuif_sock.c \
 	gprs_codel.c \
 	coding_scheme.c \
 	egprs_rlc_compression.cpp \
diff --git a/src/osmobts_sock.c b/src/pcuif_sock.c
similarity index 100%
rename from src/osmobts_sock.c
rename to src/pcuif_sock.c