Add in a new standalone env applet for fixing up app's environments

-Erik

include/applets.h

@@ -131,6 +131,9 @@
 #if defined(BB_FEATURE_GREP_EGREP_ALIAS) && defined(BB_GREP)
 	APPLET_NOUSAGE("egrep", grep_main, _BB_DIR_BIN)
 #endif
+#ifdef BB_ENV
+	APPLET(env, env_main, _BB_DIR_USR_BIN)
+#endif
 #ifdef BB_EXPR
 	APPLET(expr, expr_main, _BB_DIR_USR_BIN)
 #endif

include/usage.h

@@ -343,6 +343,15 @@
 	"$ echo "Erik\nis\ncool"\n" \
 	"Erik\nis\ncool\n"
 
+#define env_trivial_usage \
+	"[-] [-iu] [name=value ...] [command]"
+#define env_full_usage \
+	"Prints the current environment or runs a program after setting\n" \
+	"up the specified environment.\n\n" \
+	"Options:\n" \
+	"\t-, -i\tstart with an empty environment\n" \
+	"\t-u\tremove variable from the environment\n"
+
 #define expr_trivial_usage \
 	"EXPRESSION"
 #define expr_full_usage \