[pylint] webapp.py - fix all messages from pylint
[pylint] webapp.py - fix all messages from pylint

No functional change, just some linting.

- fix messages from pylint (see below)
- log where general Exceptions are catched (broad-except)
- normalized various indentation
- To avoid clashes with common names, add prefix 'route_' to all @app.route
  decorated functions.

Fixed messages::

    searx/webapp.py:744:0: C0301: Line too long (146/120) (line-too-long)
    searx/webapp.py:756:0: C0301: Line too long (132/120) (line-too-long)
    searx/webapp.py:730:9: W0511: TODO, check if timezone is calculated right (fixme)
    searx/webapp.py:1:0: C0114: Missing module docstring (missing-module-docstring)
    searx/webapp.py:126:8: I1101: Module 'setproctitle' has no 'setthreadtitle' member, but source is unavailable. Consider adding this module to extension-pkg-allow-list if you want to perform analysis based on run-time introspection of living objects. (c-extension-no-member)
    searx/webapp.py:126:36: W0212: Access to a protected member _name of a client class (protected-access)
    searx/webapp.py:131:4: R1722: Consider using sys.exit() (consider-using-sys-exit)
    searx/webapp.py:141:4: R1722: Consider using sys.exit() (consider-using-sys-exit)
    searx/webapp.py:255:38: W0621: Redefining name 'request' from outer scope (line 32) (redefined-outer-name)
    searx/webapp.py:307:4: W0702: No exception type(s) specified (bare-except)
    searx/webapp.py:374:24: W0621: Redefining name 'theme' from outer scope (line 155) (redefined-outer-name)
    searx/webapp.py:420:8: R1705: Unnecessary "else" after "return" (no-else-return)
    searx/webapp.py:544:4: W0621: Redefining name 'preferences' from outer scope (line 917) (redefined-outer-name)
    searx/webapp.py:551:4: W0702: No exception type(s) specified (bare-except)
    searx/webapp.py:566:15: W0703: Catching too general exception Exception (broad-except)
    searx/webapp.py:613:4: R1705: Unnecessary "elif" after "return" (no-else-return)
    searx/webapp.py:690:8: W0621: Redefining name 'search' from outer scope (line 661) (redefined-outer-name)
    searx/webapp.py:661:0: R0914: Too many local variables (22/20) (too-many-locals)
    searx/webapp.py:674:8: R1705: Unnecessary "else" after "return" (no-else-return)
    searx/webapp.py:697:11: W0703: Catching too general exception Exception (broad-except)
    searx/webapp.py:748:4: R1705: Unnecessary "elif" after "return" (no-else-return)
    searx/webapp.py:661:0: R0911: Too many return statements (9/6) (too-many-return-statements)
    searx/webapp.py:661:0: R0912: Too many branches (29/12) (too-many-branches)
    searx/webapp.py:661:0: R0915: Too many statements (74/50) (too-many-statements)
    searx/webapp.py:931:4: W0621: Redefining name 'image_proxy' from outer scope (line 1072) (redefined-outer-name)
    searx/webapp.py:946:4: W0621: Redefining name 'stats' from outer scope (line 1132) (redefined-outer-name)
    searx/webapp.py:917:0: R0914: Too many local variables (34/20) (too-many-locals)
    searx/webapp.py:917:0: R0912: Too many branches (19/12) (too-many-branches)
    searx/webapp.py:917:0: R0915: Too many statements (65/50) (too-many-statements)
    searx/webapp.py:1063:44: W0621: Redefining name 'preferences' from outer scope (line 917) (redefined-outer-name)
    searx/webapp.py:1072:0: R0911: Too many return statements (9/6) (too-many-return-statements)
    searx/webapp.py:1151:4: C0103: Variable name "SORT_PARAMETERS" doesn't conform to '(([a-z][a-zA-Z0-9_]{2,30})|(_[a-z0-9_]*)|([a-z]))$' pattern (invalid-name)
    searx/webapp.py:1297:0: R1721: Unnecessary use of a comprehension (unnecessary-comprehension)
    searx/webapp.py:1303:0: C0103: Argument name "e" doesn't conform to '(([a-z][a-zA-Z0-9_]{2,30})|(_[a-z0-9_]*))$' pattern (invalid-name)
    searx/webapp.py:1303:19: W0613: Unused argument 'e' (unused-argument)
    searx/webapp.py:1338:23: W0621: Redefining name 'app' from outer scope (line 162) (redefined-outer-name)
    searx/webapp.py:1318:0: R0903: Too few public methods (1/2) (too-few-public-methods)

Signed-off-by: Markus Heiser <14dfd67dd72e7ac80c040b62bb932f1e121795cc@darmarit.de>

dalf/searx,dalf/searx,dalf/searx,dalf/searx