config env: trim key and value

src/overlay_params.cpp

@@ -576,6 +576,8 @@ parse_overlay_env(struct overlay_params *params,
    uint32_t num;
    char key[256], value[256];
    while ((num = parse_string(env, key, value)) != 0) {
+      trim_char(key);
+      trim_char(value);
       env += num;
       if (!strcmp("full", key)) {
          bool read_cfg = params->enabled[OVERLAY_PARAM_ENABLED_read_cfg];

src/string_utils.h

@@ -10,6 +10,7 @@
 #include <algorithm>
 #include <cctype>
 #include <locale>
+#include <cstring>
 
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-function"
@@ -127,6 +128,22 @@ static std::vector<std::string> str_tokenize(const std::string& s, const std::st
    return v;
 }
 
+static void trim_char(char* str) {
+    if(!str)
+        return;
+
+    char* ptr = str;
+    int len = strlen(ptr);
+
+    while(len-1 > 0 && isspace(ptr[len-1]))
+        ptr[--len] = 0;
+
+    while(*ptr && isspace(*ptr))
+        ++ptr, --len;
+
+    memmove(str, ptr, len + 1);
+}
+
 #pragma GCC diagnostic pop
 
 #endif //MANGOHUD_STRING_UTILS_H