Touch up docs/comments

Remove the mention of linking with libtermcap from einfo(3), and fix
some comments in libeinfo.c to more accurately reflect the new
situation.

man/einfo.3

@@ -158,13 +158,6 @@ is true.
 prefixes the string
 .Fa prefix
 to the above functions.
-.Sh IMPLEMENTATION NOTES
-einfo can optionally be linked against the
-.Lb libtermcap
-so that we can correctly query the connected console for our color and
-cursor escape codes.
-If not, then we have a hard coded list of terminals we know about that support
-the commonly used codes for color and cursor position.
 .Sh ENVIRONMENT
 .Va EINFO_QUIET
 when set to true makes the

src/libeinfo/libeinfo.c

@@ -50,8 +50,7 @@
 #define HILITE                  6
 #define BRACKET                 4
 
-/* We fallback to these escape codes if termcap isn't available
- * like say /usr isn't mounted */
+/* ANSI escape codes which mimic termcap */
 #define AF "\033[3%dm"
 #define CE "\033[K"
 #define CH "\033[%dC"
@@ -94,7 +93,7 @@ static char *goto_column = NULL;
 static const char *term = NULL;
 static bool term_is_cons25 = false;
 
-/* No curses support, so we hardcode a list of colour capable terms
+/* Hardcoded list of colour capable terms
  * Only terminals without "color" in the name need to be explicitly listed */
 static const char *const color_terms[] = {
 	"Eterm",