Fix build issue: lower-case enum name to sync with smbdefs.h.

src/sbbs3/userdat.c

@@ -2552,7 +2552,7 @@ BOOL DLLCALL can_user_post(scfg_t* cfg, uint subnum, user_t* user, client_t* cli
 /* 'reason' is an (optional) pointer to a text.dat item number				*/
 /* usernumber==0 for netmail												*/
 /****************************************************************************/
-BOOL DLLCALL can_user_send_mail(scfg_t* cfg, enum SMB_NET_TYPE net_type, uint usernumber, user_t* user, uint* reason)
+BOOL DLLCALL can_user_send_mail(scfg_t* cfg, enum smb_net_type net_type, uint usernumber, user_t* user, uint* reason)
 {
 	if(reason!=NULL)
 		*reason=R_Email;

src/sbbs3/userdat.h

@@ -115,7 +115,7 @@ DLLEXPORT int	DLLCALL user_rec_len(int offset);
 DLLEXPORT BOOL	DLLCALL can_user_access_sub(scfg_t* cfg, uint subnum, user_t* user, client_t* client);
 DLLEXPORT BOOL	DLLCALL can_user_read_sub(scfg_t* cfg, uint subnum, user_t* user, client_t* client);
 DLLEXPORT BOOL	DLLCALL can_user_post(scfg_t* cfg, uint subnum, user_t* user, client_t* client, uint* reason);
-DLLEXPORT BOOL	DLLCALL can_user_send_mail(scfg_t* cfg, enum SMB_NET_TYPE, uint usernumber, user_t* user, uint* reason);
+DLLEXPORT BOOL	DLLCALL can_user_send_mail(scfg_t* cfg, enum smb_net_type, uint usernumber, user_t* user, uint* reason);
 DLLEXPORT BOOL	DLLCALL is_user_subop(scfg_t* cfg, uint subnum, user_t* user, client_t* client);
 DLLEXPORT BOOL	DLLCALL is_download_free(scfg_t* cfg, uint dirnum, user_t* user, client_t* client);
 DLLEXPORT BOOL	DLLCALL filter_ip(scfg_t* cfg, const char* prot, const char* reason, const char* host