set API versions back to 0

Roll back the LIBVERSIONs to 0:0:0 -- the bumps so far have been confused and
wrong. Let's start over from scratch with API-current of 0 while we still can.

Rename the mgcp_client debian .install files back to 0 to match the API
version.

Change-Id: I3d81853f811f412b186621c3657bab6af397a980

debian/control

@@ -34,7 +34,7 @@ Multi-Arch: same
 Depends: libosmo-legacy-mgcp0 (= ${binary:Version}), ${misc:Depends}
 Description: libosmo-legacy-mgcp: Osmocom's Media Gateway server library
 
-Package: libosmo-mgcp-client1
+Package: libosmo-mgcp-client0
 Section: libs
 Architecture: any
 Multi-Arch: same
@@ -46,5 +46,5 @@ Package: libosmo-mgcp-client-dev
 Section: libdevel
 Architecture: any
 Multi-Arch: same
-Depends: libosmo-mgcp-client1 (= ${binary:Version}), ${misc:Depends}
+Depends: libosmo-mgcp-client0 (= ${binary:Version}), ${misc:Depends}
 Description: libosmo-mgcp-client: Osmocom's Media Gateway Control Protocol client utilities

src/libosmo-mgcp-client/Makefile.am

@@ -22,7 +22,7 @@ AM_LDFLAGS = \
 # This is _NOT_ the library release version, it's an API version.
 # Please read Chapter 6 "Library interface versions" of the libtool
 # documentation before making any modification
-MGCP_CLIENT_LIBVERSION=1:0:1
+MGCP_CLIENT_LIBVERSION=0:0:0
 
 lib_LTLIBRARIES = \
 	libosmo-mgcp-client.la \