ipa: rename functions for consistency

As we are breaking builds by moving functions from libosmo-abis to
libosmocore anyway, we might as well give functions more appropriate
names.  ipaccess is a company, while IPA is the multiplex protocol, and
CCM is the protocol used for establishing identities on the IPA
multiplex.
diff --git a/include/Makefile.am b/include/Makefile.am
index 3b35b7b..7484e9e 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -58,7 +58,7 @@
                        osmocom/gsm/gsm48.h \
                        osmocom/gsm/gsm48_ie.h \
                        osmocom/gsm/gsm_utils.h \
-                       osmocom/gsm/ipaccess.h \
+                       osmocom/gsm/ipa.h \
                        osmocom/gsm/lapd_core.h \
                        osmocom/gsm/lapdm.h \
                        osmocom/gsm/meas_rep.h \
diff --git a/include/osmocom/gsm/ipaccess.h b/include/osmocom/gsm/ipa.h
similarity index 64%
rename from include/osmocom/gsm/ipaccess.h
rename to include/osmocom/gsm/ipa.h
index dd56069..2878676 100644
--- a/include/osmocom/gsm/ipaccess.h
+++ b/include/osmocom/gsm/ipa.h
@@ -20,41 +20,41 @@
 };
 
 /* obtain the human-readable name of an IPA CCM ID TAG */
-const char *ipaccess_idtag_name(uint8_t tag);
+const char *ipa_ccm_idtag_name(uint8_t tag);
 
 /* parse a buffer of ID tags into a osmocom TLV style representation */
-int ipaccess_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len);
+int ipa_ccm_idtag_parse(struct tlv_parsed *dec, unsigned char *buf, int len);
 
 /* parse an Unit ID in string format into the 'ipaccess_unit' data structure */
-int ipaccess_parse_unitid(const char *str, struct ipaccess_unit *unit_data);
+int ipa_parse_unitid(const char *str, struct ipaccess_unit *unit_data);
 
 /* fill a 'struct ipaccess_unit' based on a parsed IDTAG TLV */
-int ipaccess_tlv_to_unitdata(struct ipaccess_unit *ud,
+int ipa_ccm_tlv_to_unitdata(struct ipaccess_unit *ud,
 			     const struct tlv_parsed *tp);
 
 /* Send an IPA message to the given FD */
-int ipaccess_send(int fd, const void *msg, size_t msglen);
+int ipa_send(int fd, const void *msg, size_t msglen);
 
 /* Send an IPA CCM PONG via the given FD */
-int ipaccess_send_pong(int fd);
+int ipa_ccm_send_pong(int fd);
 
 /* Send an IPA CCM ID_ACK via the given FD */
-int ipaccess_send_id_ack(int fd);
+int ipa_ccm_send_id_ack(int fd);
 
 /* Send an IPA CCM ID_REQ via the given FD */
-int ipaccess_send_id_req(int fd);
+int ipa_ccm_send_id_req(int fd);
 
 /* Common handling of IPA CCM, BSC side */
-int ipaccess_rcvmsg_base(struct msgb *msg, struct osmo_fd *bfd);
+int ipa_ccm_rcvmsg_base(struct msgb *msg, struct osmo_fd *bfd);
 
 /* Common handling of IPA CCM, BTS side */
-int ipaccess_rcvmsg_bts_base(struct msgb *msg, struct osmo_fd *bfd);
+int ipa_ccm_rcvmsg_bts_base(struct msgb *msg, struct osmo_fd *bfd);
 
 /* prepend (push) an ipaccess_head_ext to the msgb */
-void ipaccess_prepend_header_ext(struct msgb *msg, int proto);
+void ipa_prepend_header_ext(struct msgb *msg, int proto);
 
 /* prepend (push) an ipaccess_head to the msgb */
-void ipaccess_prepend_header(struct msgb *msg, int proto);
+void ipa_prepend_header(struct msgb *msg, int proto);
 
 struct msgb *ipa_msg_alloc(int headroom);