system-info: fixed calls to get locales on python3

rhodecode/lib/system_info.py

@@ -182,15 +182,26 b' def platform_type():'
 def locale_info():
     import locale
 
+    def safe_get_locale(locale_name):
+        try:
+            locale.getlocale(locale_name)
+        except TypeError:
+            return f'FAILED_LOCALE_GET:{locale_name}'
+
     value = dict(
         locale_default=locale.getdefaultlocale(),
-        locale_lc_all=locale.getlocale(locale.LC_ALL),
+        locale_lc_all=safe_get_locale(locale.LC_ALL),
+        locale_lc_ctype=safe_get_locale(locale.LC_CTYPE),
         lang_env=os.environ.get('LANG'),
         lc_all_env=os.environ.get('LC_ALL'),
         local_archive_env=os.environ.get('LOCALE_ARCHIVE'),
     )
-    human_value = 'LANG: {}, locale LC_ALL: {},  Default locales: {}'.format(
-        value['lang_env'], value['locale_lc_all'], value['locale_default'])
+    human_value = \
+        f"LANG: {value['lang_env']}, \
+          locale LC_ALL: {value['locale_lc_all']},  \
+          locale LC_CTYPE: {value['locale_lc_ctype']},  \
+          Default locales: {value['locale_default']}"
+
     return SysInfoRes(value=value, human_value=human_value)
 
 
@@ -238,7 +249,7 b' def uptime():'
     human_value['boot_time'] = time_to_datetime(boot_time)
     human_value['uptime'] = age(time_to_datetime(boot_time), show_suffix=False)
 
-    human_value['text'] = u'Server started {}'.format(date_or_age)
+    human_value['text'] = 'Server started {}'.format(date_or_age)
     return SysInfoRes(value=value, human_value=human_value)