Minor improvements.

* Add new TLS policy `direct` as a replacement for `legacy`.
* Document that `/[command]?` prints the help of a command.
* Add option to get help via `/command help`.
* Fix `my-prof.supp` generation and tests for out-of-source builds.

Signed-off-by: Steffen Jaeckel <s@jaeckel.eu>

src/common.h

@@ -189,6 +189,9 @@ char* str_replace(const char* string, const char* substr, const char* replacemen
 gboolean strtoi_range(const char* str, int* saveptr, int min, int max, char** err_msg);
 int utf8_display_len(const char* const str);
 
+gboolean string_matches_one_of(const char* what, const char* is, gboolean is_can_be_null, const char* first, ...) __attribute__((sentinel));
+gboolean valid_tls_policy_option(const char* is);
+
 char* release_get_latest(void);
 gboolean release_is_new(char* found_version);